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


int main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	bool all_explored=0;
	int n,m,map[m][n];
	while (true) {    
		string feedback;
	    string command = "GO";
	    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 {
		
		}
	}
	return 0;
}