while pile >= max_stones:
        p1move= int(raw_input("How many stones would Player 1 like to remove?"))
        while p1move > max_stones:
            p1move= int(raw_input("How many stones would Player 1 like to remove?"))
        p2move= int(raw_input("How many stones would Player 2 like to remove?"))
        while p2move> max_stones:
            p2move= int(raw_input("How many stones would Player 2 like to remove?"))
        pile = pile - p1move - p2move
        print pile, 'stones are left.'
    print "Game over"