Run: 2026-07-09-01KX40070JB16XWAGEPADS3BSZ

Run Details

Duration:
16.4s
Cost:
$0.017425
Provider:
OpenAI

Model input

System
You are an expert novelist with a gift for vivid, immersive prose. You write in tight third-person limited point of view with a strong narrative voice. Your prose is clean, precise, and engaging — you favor strong verbs, concrete details, and natural-sounding dialogue. You will be given a story bible (codex) containing canonical details about characters, locations, items, and lore. Use these details to ground your writing in the established world. Stay consistent with the codex. Write only the prose of the scene. Do not include titles, chapter headings, markdown formatting, or any commentary before or after the scene.
User/Human
<codex> <character id="4416" name="Detective Harlow Quinn" aliases="Quinn, Detective Quinn, Harlow" pronouns="she/her" species="Human" storyRole="Antagonist"> <eyeColor>brown</eyeColor> <hair>closely cropped salt-and-pepper</hair> <height>5'9"</height> <age>41</age> <jawline>sharp jaw</jawline> <watch>worn leather watch on her left wrist</watch> <bearing>military precision</bearing> <description>A Metropolitan Police detective with 18 years of decorated service who suspects the clique is involved in criminal activity.</description> <backstory>She lost her partner, DS Morris, during a case three years ago under unexplained circumstances that had supernatural origins she doesn't yet understand.</backstory> </character> <character id="4414" name="Eva Kowalski" aliases="Eva, Evie" pronouns="she/her" species="Human" storyRole="Best Friend"> <eyeColor>green</eyeColor> <hair>curly red</hair> <height>5'4"</height> <age>26</age> <glasses>round glasses</glasses> <satchel>worn leather satchel full of books</satchel> <freckles>freckled complexion</freckles> <nervousHabit>tucking hair behind her left ear</nervousHabit> <description>Aurora's childhood friend and an occult researcher.</description> <backstory>Moved to London two years before Aurora and works as a research assistant at the British Museum's restricted archives. She holds a master's degree in Ancient History from Oxford.</backstory> </character> <location id="856" name="The Veil Market" aliases="Veil Market, the Market, underground market" realm="Earth"> <currentLocation>abandoned Tube station beneath Camden</currentLocation> <entryRequirement>bone token</entryRequirement> <schedule>moves locations every full moon</schedule> <description>A hidden supernatural black market that sells enchanted goods, banned alchemical substances, and information.</description> </location> <item id="2004" name="Veil Compass" aliases="the Compass, shadow compass" type="Tool" origin="The Veil Market"> <casingMaterial>small brass compass</casingMaterial> <faceMarkings>face etched with protective sigils</faceMarkings> <needle>points toward the nearest supernatural rift or portal</needle> <patina>casing has a patina of verdigris</patina> <creator>crafted by a Shade artisan</creator> <description>A compass attuned to supernatural energy.</description> </item> </codex> Write a fully fleshed out scene of at least 1000 words in the mystery genre. A detective arrives at a crime scene in an unusual location. Something is wrong — the evidence doesn't add up. A colleague is present, offering a different interpretation. Through careful observation and deduction, the detective begins to see what others have missed. Use the codex entries above as your world reference for characters and setting. Only include the prose of the scene without any markdown or commentary.

Model response

AI
Detective Harlow Quinn ducked beneath the strip of blue-and-white tape and entered the abandoned station. The air below Camden tasted of rust, wet stone, and something sweetly chemical. Her torch beam slid over cracked tiles, a dead advertising panel, the old platform edge dropping into a tunnel packed with darkness. Somewhere beyond the brick arches, water dripped with maddening regularity. The crime scene lay on the former platform. A man in a charcoal overcoat sprawled beside a shuttered kiosk, one hand curled around a silver knife. Blood had spread beneath his ribs in a clean, dark fan. Three paper lanterns hung above him, though no one had seen them lit. Their colored glass threw stains of red, blue, and yellow across the platform. Quinn stopped at the edge of the marked area. “Late,” said Detective Sergeant Vale. He stood near the body in a disposable white suit, broad shoulders hunched beneath the fluorescent glare of the portable lamps. His blond hair had already begun to sweat flat. In one gloved hand he held a plastic evidence bag containing a small bone token. “Traffic,” Quinn said. “Under Camden?” “Traffic getting here.” Vale gave her a look that might have been amusement if his mouth had not been so tight. “Victim’s Elias Venn. Forty-two. No identification on him except a membership card for some private antiquarian society. Two witnesses, both traders. They heard an argument, then a scream. Found him dead at 2:17.” Quinn checked her watch. The leather strap was cracked along the buckle. “And the estimated time of death?” “Between one and two.” “Convenient.” “Coroner’s preliminary says the wound killed him. Knife still in his hand. No defensive injuries.” Vale nodded toward the body. “Looks like suicide after a confrontation.” Quinn advanced slowly. Her military-polished instincts made every movement deliberate: heel, toe, scan, catalogue. She took in the platform, the arches, the old station signs half-hidden under soot. Camden High Level, perhaps. The name had been painted over years ago, though someone had recently traced a finger through the grime. The letters read: VEIL MARKET. Quinn looked at the bone token in the evidence bag. “Where was that found?” “Victim’s pocket.” “Which pocket?” “Left trouser.” “Anything else?” “Cash. A brass compass. Some kind of junk.” She glanced toward the evidence table. The compass lay inside a clear bag, no larger than a biscuit, its casing green with verdigris. Protective sigils crawled across its face in fine, deliberate lines. The needle pointed not north but toward the tunnel. “Junk,” Vale said. Quinn crouched beside the body. The dead man’s left hand was stiff around the knife. The blade had entered beneath the sternum and angled upward. She studied the coat. No tearing except at the wound. The blood pattern was wrong. Not wrong enough for Vale. Not wrong enough for anyone who wanted the scene to be simple. The blood had soaked the shirt immediately around the puncture, but the fan beneath him was too broad and too even. A stab wound could produce a pool. It could produce arterial spray. It did not usually produce a neat semicircle reaching uphill against the slight slope of the platform. Quinn touched nothing. She leaned closer. There was blood on the knife handle, but none beneath Venn’s fingernails. His hand had been closed around it after death. The fingers curved around the hilt without the pressure marks she would expect from a man gripping a weapon in pain. “Suicide,” Vale repeated. “Maybe.” “You said that like you’ve already decided it isn’t.” “I said maybe.” He exhaled through his nose. “Two traders saw him arguing with a woman. Red hair, glasses, early twenties. They heard Venn say, ‘You should never have opened it.’ Then the woman ran.” Quinn’s attention sharpened. “Description?” “Red hair. Green coat. Freckles, apparently. The witnesses were more interested in their own businesses than the murder.” “Name?” “No.” “Cameras?” Vale gestured at the ceiling. “Station’s been abandoned for thirty years. There’s no power.” Quinn looked up anyway. The lanterns hung from a length of black cord strung between two iron brackets. Their flames flickered without smoke. “What are those?” “Market décor.” “What market?” Vale shrugged. “That’s what the witnesses call this place. The Veil Market. Underground stalls, counterfeit charms, illegal drugs, whatever. We’ve had reports before, but nothing that holds up.” “Reports of what?” “People buying things that don’t exist.” “People usually buy things that exist.” “That’s what I mean.” Quinn moved past him to the body. In the reflected lantern light, Venn’s face had a gray cast. His eyes were open. There was a crescent of black residue along his lower lip, like soot or powdered charcoal. She took out her notebook. “Did anyone touch him?” “Witnesses checked for a pulse. One moved the hand.” “Which witness?” “Woman named Mrs. Armitage. Claims she sells tinctures.” “Claims?” Vale’s gaze drifted toward the far end of the platform, where a row of stalls crouched beneath canvas awnings. Their signs were written in languages Quinn did not recognize. “You’ll understand when you meet them.” “I understand already.” “No, you don’t.” The words landed too quickly. Vale looked away. Quinn studied him. His suit was clean except for a pale dusting on his right sleeve, fine as flour. His boots were damp. The platform was damp everywhere except around the body. “What happened to your sleeve?” Vale glanced down. “Dust.” “From where?” “Ceiling, probably.” “There’s no dust on your other sleeve.” He smiled without warmth. “You’ve been watching too many forensic dramas.” “I’ve been doing this eighteen years.” “Then you know a scene can look strange before it makes sense.” “Sometimes it looks strange because someone has arranged it.” The lanterns fluttered. Their colored light shifted across the body, and for one instant Quinn saw a second shadow lying beside Venn’s. It had no owner. She blinked. The shadow was gone. Three years earlier, DS Morris had vanished in a locked room beneath Whitechapel. The official explanation had been structural collapse. Quinn had never accepted it. She remembered the chalk-white circle on the floor, the smell of burned pennies, and Morris shouting her name from somewhere that was not the room. Afterward, she had stopped trusting anything that looked impossible. She reached for the compass bag. Vale caught her wrist. His hand was firm. His eyes had changed. “Don’t,” he said. Quinn looked at his fingers around her sleeve, then at his face. “That’s not protocol.” “The evidence officer has logged it.” “It isn’t evidence if you’re afraid to let me examine it.” “I’m not afraid.” The needle inside the compass trembled against the glass. It pointed directly at Quinn. Then it swung toward Vale. Then toward the tunnel. Quinn pulled her arm free. “Open the bag.” “Why?” “Because I asked.” Vale hesitated. That was enough. She took the bag from the table and held it under the lamp. The brass casing was greened with age, but the scratches on its rim were fresh. Someone had pried at it recently. A dark smear marked one edge, not blood but something oily and iridescent. The face bore four protective sigils. One had been scratched through. “Where did you find this?” she asked. “On the body.” “Was the needle pointing at the tunnel?” “Could have been.” “Could have been?” “Quinn.” She turned the bag over. A label had been fixed to the back. The handwriting belonged to the scene photographer. Found in victim’s left coat pocket. But the victim wore no coat over his charcoal overcoat. The pocket had been empty when Quinn first saw it. She had checked the outline. The compass had been placed in the evidence bag before she arrived, not photographed in situ. “Where’s the coat?” she asked. Vale’s face tightened. “Victim’s coat,” she said. “Where is it?” He looked toward the far stalls. A woman stood there, half-hidden beneath a green canvas awning. Curly red hair. Round glasses. A worn leather satchel pressed to her side. Eva Kowalski saw Quinn looking and tucked a curl behind her left ear. Then the lights went out. For two seconds the station vanished. Quinn heard a sharp metallic click, the scrape of a shoe, and something whispering in the tunnel. Not a voice exactly. More like paper dragged across stone. The lamps came back. The woman was gone. So was Vale. Quinn did not move. She let the scene return in pieces. The body. The lanterns. The stalls. The tunnel. Then she looked at the blood. The fan had changed. A thin red line now ran from the pool toward the tunnel, disappearing beneath the platform’s broken lip. It had not been there before. Quinn drew her weapon and stepped backward. “Sergeant Vale?” No answer. The compass needle spun wildly inside its bag. Quinn crouched and examined the blood trail. It did not run along the floor. It clung to the underside of the platform edge, flowing upward against gravity in narrow beads. A portal, she thought, though she did not know why the word came to her. The thought felt remembered rather than imagined. She tore open the evidence bag and took out the compass. Its brass casing was cold enough to burn. The needle snapped toward the tunnel. Behind her, a voice said, “Detective.” Vale stood beside the body. His white suit was gone. His clothes were dark and dry, his right sleeve dust-free. In his hand he held the bone token. Quinn kept the compass level. “Where’s the real Sergeant Vale?” The thing wearing his face smiled. The lanterns flared red. Quinn glanced at the compass face. One of the etched sigils had begun to glow. The needle pointed not toward the tunnel now, but at the shadow beneath Vale’s shoes. There was no shadow beneath Vale’s shoes. Quinn fired. The shot cracked through the station. The false Vale jerked sideways, and the bullet struck the kiosk behind him. Black fluid splashed across the tiles. The shape folded inward, its features collapsing like wet paper. From the far end of the platform, Eva Kowalski screamed, “The arch!” Quinn turned. Eva stood beside a brick archway that had not been there a moment earlier. Pale blue light leaked through its cracks. “Don’t let it cross!” Eva shouted. “What is it?” “Not a person!” The thing on the platform unfolded. Quinn raised the compass. The needle drove hard against the glass, pointing to the glowing arch. The protective sigil burned beneath her thumb. She understood then. The evidence had not been inconsistent. It had been layered. The blood, the missing coat, the false witness, the impossible shadow—all of it had been arranged to make the murder look human. But the killer had left one mistake. It had carried the wound away from the body. The blood trail was not a trail. It was a tether. Quinn seized the compass and pressed its face against the broken sigil. The station shook. The false Vale lunged. Eva flung open her satchel and hurled a book into its path. The old volume burst into white flame. The creature recoiled, revealing a hole where its chest should have been. Quinn drove the compass toward the arch. The needle snapped. The blue light collapsed with a sound like a door slamming underwater. The creature screamed—not in a human voice, but in the voices of everyone Quinn had ever failed to save. Morris’s voice was among them. She nearly dropped the compass. Then Eva shouted her name. Quinn clenched her jaw, stepped forward, and forced the needle down. The arch vanished. The creature vanished with it. Silence returned to the platform, broken only by the dripping water and Quinn’s breathing. Eva approached cautiously, her satchel smoking at the edges. “Are you hurt?” Quinn looked at the compass. The scratched sigil had sealed itself, leaving only a faint green line in the brass. “Where’s Vale?” “Alive. Probably. It threw him behind the stalls when the lights went out.” “And Venn?” Eva glanced at the corpse. “He was killed by the thing?” “Not exactly.” Quinn looked again at the blood, now ordinary and motionless. “He opened something. Then he tried to close it. Someone—or something—made sure he couldn’t.” Eva pushed her glasses up her nose. “You believe me?” Quinn slipped the compass into a fresh evidence bag. “No,” she said. “But I know what I saw.” From the tunnel came a distant metallic click. The compass needle turned toward it. Quinn closed her hand around the bag. “Tell me everything about the Veil Market,” she said. “And start with why that station moves every full moon.”
created_at"2026-07-09T17:49:54.585Z" 7/9/2026, 5:49:54 PM
model"openai/gpt-5.6-luna-20260709"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency339
moderation_latency(null)
generation_time15487
tokens_prompt923
tokens_completion3599
native_tokens_prompt835
native_tokens_completion2765
native_tokens_completion_images0
native_tokens_reasoning0
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
num_fetches(null)
web_search_engine(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
service_tier"default"
usage0.017425
router(null)
provider_responses
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endpoint_id"eebea444-34a5-4642-a766-cb319471d33a"
id"resp_02ab5aab61dc383c016a4fdf42a7ac81939e0201878b474324"
is_byokfalse
latency203
model_permaslug"openai/gpt-5.6-luna-20260709"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.18.0; linux; x64))"
http_referer(null)
request_id"req-1783619394-u18p2owL6wpL979fI5GB"
session_id(null)
preset_id(null)
api_type"completions"
id"gen-1783619394-ht00fYd0SxCPk0NvFGrw"
upstream_id"resp_02ab5aab61dc383c016a4fdf42a7ac81939e0201878b474324"
total_cost0.017425
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"
response_cache_source_id(null)
data_region"global"

Evaluation details

Result Evaluator Details Meta Data
100.00% Adverbs in dialogue tags
Target: ≤10% dialogue tags with adverbs
totalTags14
adverbTagCount1
adverbTags
0"Quinn looked again [again]"
dialogueSentences89
tagDensity0.157
leniency0.315
rawRatio0.071
effectiveRatio0.022
90.47% AI-ism adverb frequency
Target: <2% AI-ism adverbs (58 tracked)
wordCount2099
totalAiIsmAdverbs4
found
0
adverb"sweetly"
count1
1
adverb"slowly"
count1
2
adverb"quickly"
count1
3
adverb"cautiously"
count1
highlights
0"sweetly"
1"slowly"
2"quickly"
3"cautiously"
100.00% AI-ism character names
Target: 0 AI-default names (17 tracked, −20% each)
codexExemptions(empty)
found(empty)
100.00% AI-ism location names
Target: 0 AI-default location names (33 tracked, −20% each)
codexExemptions(empty)
found(empty)
80.94% AI-ism word frequency
Target: <2% AI-ism words (290 tracked)
wordCount2099
totalAiIsms8
found
0
word"traced"
count1
1
word"flickered"
count1
2
word"pulse"
count1
3
word"warmth"
count1
4
word"fluttered"
count1
5
word"trembled"
count1
6
word"etched"
count1
7
word"silence"
count1
highlights
0"traced"
1"flickered"
2"pulse"
3"warmth"
4"fluttered"
5"trembled"
6"etched"
7"silence"
100.00% Cliché density
Target: ≤1 cliche(s) per 800-word window
totalCliches1
maxInWindow1
found
0
label"clenched jaw/fists"
count1
highlights
0"clenched her jaw"
100.00% Emotion telling (show vs. tell)
Target: ≤3% sentences with emotion telling
emotionTells0
narrationSentences210
matches(empty)
100.00% Filter word density
Target: ≤3% sentences with filter/hedge words
filterCount2
hedgeCount0
narrationSentences210
filterMatches
0"watch"
1"look"
hedgeMatches(empty)
100.00% Gibberish response detection
Target: ≤1% gibberish-like sentences (hard fail if a sentence exceeds 800 words)
analyzedSentences284
gibberishSentences0
adjustedGibberishSentences0
longSentenceCount0
runOnParagraphCount0
giantParagraphCount0
wordSaladCount0
repetitionLoopCount0
controlTokenCount0
repeatedSegmentCount0
maxSentenceWordsSeen34
ratio0
matches(empty)
100.00% Markdown formatting overuse
Target: ≤5% words in markdown formatting
markdownSpans0
markdownWords0
totalWords2095
ratio0
matches(empty)
100.00% Missing dialogue indicators (quotation marks)
Target: ≤10% speech attributions without quotation marks
totalAttributions17
unquotedAttributions0
matches(empty)
33.33% Name drop frequency
Target: ≤1.0 per-name mentions per 100 words
totalMentions85
wordCount1641
uniqueNames13
maxNameDensity2.32
worstName"Quinn"
maxWindowNameDensity4
worstWindowName"Quinn"
discoveredNames
Harlow1
Quinn38
Camden2
Detective2
Sergeant1
Vale21
High1
Level1
Venn3
Morris3
Whitechapel1
Kowalski2
Eva9
persons
0"Harlow"
1"Quinn"
2"Camden"
3"Sergeant"
4"Vale"
5"Venn"
6"Morris"
7"Kowalski"
8"Eva"
places(empty)
globalScore0.342
windowScore0.333
100.00% Narrator intent-glossing
Target: ≤2% narration sentences with intent-glossing patterns
analyzedSentences120
glossingSentenceCount0
matches(empty)
9.07% "Not X but Y" pattern overuse
Target: ≤1 "not X but Y" per 1000 words
totalMatches4
per1kWords1.909
wordCount2095
matches
0"not north but toward the tunnel"
1"not blood but something oily"
2"not toward the tunnel now, but at the shadow beneath Vale’s shoes"
3"not in a human voice, but in the voices of everyone Quinn had ever failed to save"
100.00% Overuse of "that" (subordinate clause padding)
Target: ≤2% sentences with "that" clauses
thatCount0
totalSentences284
matches(empty)
100.00% Paragraph length variance
Target: CV ≥0.5 for paragraph word counts
totalParagraphs175
mean11.97
std12.73
cv1.064
sampleLengths
015
145
28
355
49
55
645
73
82
93
1051
1118
124
131
1426
1550
165
1710
184
192
202
212
222
238
2442
253
2640
2717
2850
296
3042
313
321
339
343
3532
364
3718
381
391
401
4114
4223
433
442
452
4628
473
486
496
85.21% Passive voice overuse
Target: ≤2% passive sentences
passiveCount12
totalSentences210
matches
0"been painted"
1"been closed"
2"were written"
3"was gone"
4"was greened"
5"been scratched"
6"been fixed"
7"been placed"
8"was gone"
9"was gone"
10"been layered"
11"been arranged"
100.00% Past progressive (was/were + -ing) overuse
Target: ≤2% past progressive verbs
pastProgressiveCount0
totalVerbs273
matches(empty)
100.00% Em-dash & semicolon overuse
Target: ≤2% sentences with em-dashes/semicolons
emDashCount2
semicolonCount0
flaggedSentences2
totalSentences284
ratio0.007
matches
0"The blood, the missing coat, the false witness, the impossible shadow—all of it had been arranged to make the murder look human."
1"The creature screamed—not in a human voice, but in the voices of everyone Quinn had ever failed to save."
100.00% Purple prose (modifier overload)
Target: <4% adverbs, <2% -ly adverbs, no adj stacking
wordCount1650
adjectiveStacks0
stackExamples(empty)
adverbCount49
adverbRatio0.029696969696969697
lyAdverbCount16
lyAdverbRatio0.009696969696969697
100.00% Repeated phrase echo
Target: ≤20% sentences with echoes (window: 2)
totalSentences284
echoCount0
echoWords(empty)
100.00% Sentence length variance
Target: CV ≥0.4 for sentence word counts
totalSentences284
mean7.38
std5.34
cv0.723
sampleLengths
015
113
222
310
48
518
611
713
813
99
105
1121
129
1315
143
152
163
1718
1833
194
208
216
224
231
2420
256
263
2711
2814
294
3018
315
3210
334
342
352
362
372
388
396
4017
4110
429
433
445
4510
4610
474
486
495
42.96% Sentence opener variety
Target: ≥60% unique sentence openers
consecutiveRepeats23
diversityRatio0.30633802816901406
totalSentences284
uniqueOpeners87
100.00% Adverb-first sentence starts
Target: ≥3% sentences starting with an adverb
adverbCount8
totalSentences189
matches
0"Somewhere beyond the brick arches,"
1"Then it swung toward Vale."
2"Then toward the tunnel."
3"Then the lights went out."
4"More like paper dragged across"
5"Then she looked at the"
6"Pale blue light leaked through"
7"Then Eva shouted her name."
ratio0.042
100.00% Pronoun-first sentence starts
Target: ≤30% sentences starting with a pronoun
pronounCount44
totalSentences189
matches
0"Her torch beam slid over"
1"Their colored glass threw stains"
2"He stood near the body"
3"His blond hair had already"
4"Her military-polished instincts made every"
5"She took in the platform,"
6"She glanced toward the evidence"
7"She studied the coat."
8"It could produce arterial spray."
9"It did not usually produce"
10"She leaned closer."
11"His hand had been closed"
12"He exhaled through his nose."
13"Their flames flickered without smoke."
14"His eyes were open."
15"She took out her notebook."
16"Their signs were written in"
17"His suit was clean except"
18"His boots were damp."
19"He smiled without warmth."
ratio0.233
49.95% Subject-first sentence starts
Target: ≤72% sentences starting with a subject
subjectCount155
totalSentences189
matches
0"Detective Harlow Quinn ducked beneath"
1"The air below Camden tasted"
2"Her torch beam slid over"
3"The crime scene lay on"
4"A man in a charcoal"
5"Blood had spread beneath his"
6"Their colored glass threw stains"
7"Quinn stopped at the edge"
8"He stood near the body"
9"His blond hair had already"
10"Vale gave her a look"
11"Quinn checked her watch."
12"The leather strap was cracked"
13"Vale nodded toward the body"
14"Quinn advanced slowly."
15"Her military-polished instincts made every"
16"She took in the platform,"
17"Camden High Level, perhaps."
18"The name had been painted"
19"The letters read: VEIL MARKET."
ratio0.82
0.00% Subordinate conjunction sentence starts
Target: ≥2% sentences starting with a subordinating conjunction
subConjCount0
totalSentences189
matches(empty)
ratio0
100.00% Technical jargon density
Target: ≤6% sentences with technical-jargon patterns
analyzedSentences62
technicalSentenceCount0
matches(empty)
100.00% Useless dialogue additions
Target: ≤5% dialogue tags with trailing filler fragments
totalTags14
uselessAdditionCount0
matches(empty)
100.00% Dialogue tag variety (said vs. fancy)
Target: ≤10% fancy dialogue tags
totalTags12
fancyCount3
fancyTags
0"Vale repeated (repeat)"
1"the platform Eva Kowalski screamed (scream)"
2"Eva shouted (shout)"
dialogueSentences89
tagDensity0.135
leniency0.27
rawRatio0.25
effectiveRatio0.067
86.3978%