Unindent does not match any outer indentation level. Need Help ASAP

I am fairly new to Python and have been given an assignment by my teacher. The Assignment is to Ask the User questions and have the program give back a response. Here is the code that gives the error:

while input(A) or input(Charmander):
      print(A)
   elif input(B) or input(Squirtle):
      print(B)
   elif input(C) or input(Bulbasaur):
      print(C)

The error occurs after input(Squirtle): Can anyone help?