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

#define REP(i, n) for (int i = 0; i < n; i++)
#define REPR(i, n) for (int i = n; i >= 0; i--)
#define FOR(i, m, n) for (ll i = m; i < n; i++)
#define FORR(i, m, n) for (ll i = m; i >= n; i--)
#define REPO(i, n) for (ll i = 1; i <= n; i++)
#define ll long long
#define INF (ll)1ll << 60
#define MINF (-1 * INF)
#define ALL(n) n.begin(), n.end()
#define MOD (ll)1000000007
#define P pair<ll, ll>

ll x, y, n;
int main(){
  char c;
  cin >> c;
  cout << "? " << c << c << endl;
  while(1){
    string res1, res2;
    cin >> res1 >> res2;
    if(res1 == "!")break;
    cout << "? " << res2[1] << c << endl; 
  }
}