import sys
import math
from itertools import product, permutations, combinations, accumulate
from heapq import heapify, heappush, heappop
from collections import deque, defaultdict, Counter
from bisect import bisect, bisect_left, bisect_right
from copy import copy, deepcopy
#from sortedcontainers import SortedSet, SortedList, SortedDict

sys.setrecursionlimit(10**7)
INF = float('inf')
LINF = 1 << 60
MOD = 10**9+7

def mii():
    return map(int, sys.stdin.readline().split())


a = input()

t = 0

while True:
    if t == 0:
        print(r"?", a + a, flush=True)
    else:
        o, aa = input().split()
        print(r"?", a + aa[1], flush=True)