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What's the difference?

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All stages · Demo 357

Ukrainian IPN

Choice ipn / tmp / other. Ten digits; first weight is −1. Jev never mods 11. Nine digits need 10.

ChoiceIPN −1,5,7 in JS

A digit tape. 3184719693 books an STS plate. A last-digit flip rejects. Nine digits never pass.

replaykind —ipn —

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.