You find yourself at the front entrance to the Mütter Museum of The College of Physicians of Philadelphia. You have always wanted to know what it was like at night. Do all the specimens come to life? Does the building have secret passageways? No lights on inside; probably everyone is gone. Now’s your chance to sneak in.

You make your way up the stairs to the wooden double doors. You go to pull the handles open only to find them locked. Embedded above one of the handles, you see a combination lock. That must be what’s keeping the doors shut. Upon inspection, you conclude the lock needs a four-digit code to open. You imagine they might make the lock an easy number to remember, one that might have some special significance to The College.