Shuffles all arguments and returns them.
            ARG_1,...,ARG_N

        %{SHUFFLE:A, B ,...,F} -> 'CDA B FE'

def shuffle(self, *args):
        """Shuffles all arguments and returns them.
            ARG_1,...,ARG_N

        %{SHUFFLE:A, B ,...,F} -> 'CDA B FE'
        """
        call_args = list(args)
        self.random.shuffle(call_args)
        return ''.join(call_args)