import sys, math
sys.set_int_max_str_digits(0)
inf = 1<<60
MOD = 998244353

default = input()
shote = default + default
#material = []
alphas = 'abcdefghijklmnopqrstuvwxyz'
#for s in alphas:
#    if s == default:
#        continue
#    material.append(s + default)

# 'default'でおわるやつでいじめる
#material.append(default + default)
#print(material)

while True:
    print('?', shote)

    sign, t = input().split()
    if sign == '?':
        ans = t + default
        print('?', ans)
    else:
        break