#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
	char x;
	cin >> x;
	cout << '?' << ' ' << x << x << endl;
	for(int i = 0; i < 25; i++) {
		string s;
		char c;
		cin >> c >> s;
		cout << '?' << ' ' << s[1] << x << endl;
	}
	string s;
	char c;
	cin >> c >> s;
	return 0;
}