Mastermind Solver

Enter a secret code and press space to let the program take guesses. 

After each guess a hint is given, which tells you the number of correct digits and the number of misplaced ones.

Works by generating a list of all possible solutions and after each guess eliminating those solutions who wouldn't give the same hint. This is not the best method, but by far the simplest one and manages to solve most codes in just a few guesses.