#include <bits/stdc++.h> using namespace std; int main() { ios_base::sync_with_stdio(false); cin.tie(nullptr); char c; cin >> c; cout << "? " << c << c << endl; while(true){ char a; string s; cin >> a >> s; if(a == '!') return 0; cout << "? " << s.at(1) << c << endl; } }