#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<long long> VL;
typedef vector<VL> VVL;
typedef long long LL;
#define all(a) (a).begin(), (a).end()
#define Yes(n) cout << ((n) ? "Yes" : "No"  ) << endl
#define ALL(a)  (a).begin(),(a).end()
#define pb push_back

int main() {
  char c;cin>>c;
  string s;
  cout<<"? "<<c<<c<<endl;
  while(1){
    cin>>s;
    cout<<s<<endl;
    if(s=="!"){break;}
    cout<<"? "<<s[1]<<c<<endl;
  }
}