okay, so dolls. I don't know why it's telling you their names, it may be bug or update. Maybe look for picture with all the girls, and try to "use" dolls in pattern of years, or smth

And the safe code you wrote isn't for university safe, it's code for Asylum one.

The one in university you can open after beating rose in poker game, once she tell you the code in one of her sex scene's dialog