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

#define debug(x) cerr << #x << " = " << (x) << endl
#define all(a) (a).begin(), (a).end()
#define rall(a) (a).rbegin(), (a).rend()
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef long double ld;
typedef pair<int, int> Pii;
typedef pair<ll, ll> Pll;

struct IOSetup
{
	IOSetup()
	{
		cin.tie(nullptr)->sync_with_stdio(false);
		cout << fixed << setprecision(16);
		cerr << fixed << setprecision(16);
	}
} iosetup;

template <typename T1, typename T2>
ostream &operator <<(ostream &os, const pair<T1, T2> &p)
{
	os << p.first << " " << p.second;
	return os;
}

template <typename T1, typename T2>
istream &operator >>(istream &is, pair<T1, T2> &p)
{
	is >> p.first >> p.second;
	return is;
}

template <typename T>
ostream &operator <<(ostream &os, const vector<T> &v)
{
	for(int i = 0; i < (int) v.size(); i++) os << v[i] << (i+1 == (int) v.size() ? "" : " ");
	return os;
}

template <typename T>
istream &operator >>(istream &is, vector<T> &v)
{
	for(int i = 0; i < (int) v.size(); i++) is >> v[i];
	return is;
}

template <typename T> bool chmax(T &a, const T &b) { if(a < b) { a = b; return true; } return false; }
template <typename T> bool chmin(T &a, const T &b) { if(a > b) { a = b; return true; } return false; }

////////////////////////////////////////////////////////

int main()
{
	char c; cin >> c;
	cout << "? " << string(2, c) << endl;
	while(true)
	{
		char res; cin >> res;
		string s; cin >> s;
		assert(!(res == '!' && s == "LOSE"));
		if(res == '!' && s == "WIN") return 0;
		cout << "? " << s[1] << c << endl;
	}
	return 0;
}