This problem might be relatively simple, but I'm given two text files. One text file contains all encrypted passwords encrypted via crypt.crypt in python. The other list contains over 400k+ normal dictionary words.

The assignment is that given 3 different functions which transform strings from their normal case to all different permutations of capitalizations, transforms a letter to a number (if it looks alike, e.g. G -> 6, B -> 8), and reverses a string. The thing is that given the 10 - 20 encrypted passwords in the password file, what is the most efficient way to get the fastest running solution in python to run those functions on dictionary word in the words file? It is given that all those words, when transformed in whatever way, will encrypt to a password in the password file.

Here is the function which checks if a given string, when encrypted, is the same as the encrypted password passed in:

def check_pass(plaintext,encrypted):
 crypted_pass = crypt.crypt(plaintext,encrypted)
 if crypted_pass == encrypted:
  return True
 else:
  return False

Thanks in advance.