A detective was working undercover to try to bust a suspected gang of criminals. He got invited to a fancy club that needs a password to get in, but the gang leader said that everyone will be given the password at the door to avoid any potential moles. When he gets to the entrance, the bouncer gives him a slip of paper with the following code:
After a bit of thinking, he's narrowed it down to two possible ciphers but doesn't know which one it is. He asks the bouncer one question about the 2 question marks. Once the bouncer affirms his suspicions, the detective is able to figure the password out and access the meeting, where they confess their plot. He arrests everyone and gets a nice promotion.
What was the password?
The question marks are the same letter.