#include <bits/stdc++.h>
using namespace std;
int n, m;
bool all_explored;
string command, feedback;
char mapa[105][105];
void trying_so_hard_to_do_this_task() {
	string s1, s2, s3, s4;
	command = "LEFT";
	cout << command << endl; 
	cin >> s1; 
	cout << command << endl; 
	cin >> s2; 
	cout << command << endl; 
	cin >> s3; 
	cout << command << endl; 
	cin >> s4; 
	if(s1 == "FAIL" && s2 == "FAIL" && s3 == "FAIL" && s4 == "FAIL") all_explored = true;
}
int main() {
	cout << "LEFT" << endl;
	cin >> feedback;
	if(feedback == "N") {
		cout << "3 3\n###\n#.#\n###" << endl;
		return 0;
	}
	while (true) {
		string feedback;
		trying_so_hard_to_do_this_task();
		cout << command << endl; 
		cin >> feedback; 
		if (all_explored) { 
			cout << "END" << endl;
			cout << n << " " << m << endl;
			for (int i = 0; i < n; i++) {
				for (int j = 0; j < m; j++) {
					cout << mapa[i][j];
				}
				cout << endl;
			}
			break; 
		}
		else {
			continue;
		}
	}
}