Thanks to all who helped! We were even able to make it pretty Pesach-themed (you had to add up numbers like “orders of the Mishnah” to get one of the numbers for the combination - and I made them sing a song from the Hamilton Haggadah to get one of the clues).
I tried to post about this last night, but after however many glasses of wine I had (plus our totally non-Kosher tradition of pre-Seder Fireball shots), it basically came out as “ESCJDOPE ROOM AFIKOJLEN!!!!” I woke up this morning with a mysterious bruise on my finger and some melted chocolate in my bra. Damn, Passover is truly the best holiday. Hag sameach GT!