Record bae9d516c59f4b07b203c024d821e773

Ultra reads the prompt, this answer, the verified correct answer and the difficulty settings, then explains the mistake. The verifier's own classification is shown next to it for comparison.

At 8:00, Petra moved the bright tablet into the south stairwell. At 8:01, she carried the bright tablet to the north stairwell. At 8:02, she brought the bright tablet over to the utility closet. At 8:03, Wyatt carried the bright tablet to the conference room. At 8:03, she was nearby and saw this happen. At 8:04, Uma brought the bright tablet over to the rooftop terrace. At 8:04, Petra happened to be watching. At 8:05, she moved the bright tablet into the security office. At 8:06, Wyatt moved the bright tablet into the gym. At 8:06, she was nearby and saw this happen. At 8:07, he moved the bright tablet into the lobby. At 8:07, she was nearby and saw this happen. At 8:08, he took the bright tablet and placed it in the server room. At 8:08, she was nearby and saw this happen. At 8:09, Uma moved the bright tablet into the mail room. At 8:10, Wyatt took the old basket and placed it in the conference room. At 8:11, Petra brought the old basket over to the loading dock. At 8:12, he reorganized some papers on the desk. At 8:13, Uma refilled a cup of coffee. At 8:14, Petra checked their email.

Where does Petra believe the bright tablet is? Answer with only the location name (or 'unknown' if they have no belief).

mail room

(no reasoning captured)