def minimumMoves( s=''):
        count = 0
        i = 0
        while i < len(s):
            if s[i] == 'X':
                count += 1
                i += 3
            elif s.count("X") == 0:
                break
            else:
                i += 1
        return count

print(minimumMoves("XOOOXOOOOX"))