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What's the difference?

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All stages · Demo 216

NDC 5-4-2

Choice brand / generic / compound. An 11-digit NDC is five, four, two. Jev never counts hyphens. A 4-4-2 plate rejects. Letters in a segment reject.

ChoiceNDC 5-4-2 format in JS

A digit tape. 00780-0426-15 books brand. 0078-0426-15 needs 5-4-2. A trailing X never digits.

replaykind —ndc —

STANDBY

All 4056 stages

Educational stage on jev.page — not the official TypeSafe console. Live calls go to POST https://api.typesafe.ai/v1/systemone from your browser when you paste a key. Without a key, the stage plays a recorded decision shaped like jev-1.13.0. Jev does not write the UI copy.