typedef long long ll;
typedef long double ld;

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

signed main() {
    char a;
    std::cin >> a;
    std::cout << "? "<<a<<a << std::endl;
    while(true){
        string judge, T;
        std::cin >> judge>>T;
        if(T=="WIN")return 0;
        std::cout << "? "<<T[1]<<a << std::endl;
    }
};