A=input()
abc="abcdefghijklmnopqrstuvwxyz"
print('?',A+A)
Set=set(A)
q=list(map(str,input().split()))
while True:
    for i in range(len(abc)):
        if abc[i] in Set:
            continue
        print('?', q[1][-1]+A)
        Set.add(abc[i])
        break
    q=list(map(str,input().split()))
    if q[0]=="!":
        exit(0)