I think you’re having trouble because the one posted here doesn’t look like it’s entirely accurate. Some of the mug shots don’t look correct. But, there could be a difference between different versions of the game. I’m not 100% sure.
I started making my own cheat sheet (sorry, never finished it!) with the actual screenshots from the game. And so if what I have here is correct, you have to type the names as shown here, first letter uppercase, rest lowercase. Try this and let me know if it works!
