#include<bits/stdc++.h>
using namespace std;
int main(){
	char map[1000][1000];
	for(int i=0;i<1000;i++){
		for(int j=0;j<1000;j++){
			map[i][j]='#';
		}	
	}
	string command="LEFT";
	bool all_explored=true;
	while (true) { 
		string feedback; 
		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 << map[i][j];
				}
				cout << endl; 
			}
			break;
		else{
			
		}
	}
}