#include<bits/stdc++.h>
using namespace std;
int main(){
	string command;
	while (true) {
		string feedback;
		command ="E"; //
		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 {
		 	while (true) {
				string feedback;
				command ="W"; //
				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 {
		 
		}

	}
		}

	}
}