1. Try NO one standing on any platform to get 1st digit from NPC.
2. Try 1 person standing on left platform to get 2nd digit from NPC.
3. Try 1 person standing on middle platform to get 3rd digit from NPC.
4. Try 1 person standing on right platform to get 4th digit from NPC.
Warning: If you tested more than 7 tries, you will be send out of the room and the answer will be regenerated again