#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <tuple>
#include <cstdio>
#include <cmath>
#include <cassert>
#define rep(i, n) for(i = 0; i < n; i++)
#define int long long
using namespace std;

signed main() {
    string s;
    getline(cin, s);
    char alpha = s[0];
    cout << "? " << alpha << alpha << endl;
    cout.flush();

    while (true) {
        string res;
        getline(cin, res);
        if (res[0] == '!') { return 0; }
        cout << "? " << res[3] << alpha << endl;
        cout.flush();
    } 
    return 0;
}