#include <iostream>
#include <vector>
#include <set>
#include <string>

using namespace std;
using ll = long long;


int main(){
  string a;
  cin >> a;
  set<string> st;
  for (char c = 'a'; c <= 'z'; c++){
    st.insert(c + a);
  }
  cout << "? " << a << a << endl;
  st.erase(st.find(a + a));
  while (true){
    char j;
    string e;
    cin >> j >> e;
    if (e == "LOSE" || e == "WIN") return 0;
    if (st.find(e) != st.end())
      st.erase(st.find(e));
    string f = e;
    f[0] = e[1];
    f[1] = e[0];
    cout << "? " << f << endl;
    st.erase(st.find(f));
  }
}