from sys import stdin


def output(*values):
    print(*values, flush=True)


def main():
    alpha = stdin.readline().rstrip()

    abc = set('abcdefghijklmnopqrstuvwxyz')
    # print(abc)

    first = True

    tail = ''
    while True:
        if first:
            out = alpha + alpha
            abc.remove(alpha)
            first = False
        else:
            out = tail + alpha
        output('?', out)

        judge_input = stdin.readline().rstrip()
        if judge_input == '! LOSE' or judge_input == '! WIN':
            return

        tail = judge_input[-1]


if __name__ == "__main__":
    main()