#include <bits/stdc++.h>
using namespace std;

#define rep(i, n) for( int i = 0; i < n; i++ )
using ll = long long;

int main() {
	char c;
	cin >> c;
	cin.ignore(numeric_limits<streamsize>::max(), '\n');
	cout << "? " << c << c << endl;
	while(1) {
		string t;
		getline(cin, t);
		if(t[0] == '!') break;
		char cc = t[3];
		cout << "? " << cc << c << endl;
	}
}