#include <bits/stdc++.h>
//#include<atcoder/all>
using namespace std;
//using namespace atcoder;
using ll = long long;
const ll mod = 1000000007;
//const ll mod = 998244353;
int dx[4] = { 0,1,0,-1 }, dy[4] = { -1,0,1,0 };
char a;
int main() {
	cin >> a;
	cout << "?" << " " << a << a << endl;
	while (1) {
		char t;
		string s;
		cin >> t >> s;
		if (t == '!')return 0;
		cout << "?" << " " << s[1] << a << endl;
	}
}