#include <iostream>
#include <vector>
using Int = long long;
int main() {
	char A;
	std::cin >> A;
	std::cout << "? " << A << A << std::endl;
	for (int i = 0; i < 26; ++i) {
		std::string S, T;
		std::cin >> S >> T;
		if (S == "!" && T == "WIN") {
			break;
		}
		std::cout << "? " << T.back() << A << std::endl;
	}
}