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

int mma[1000][1000],la[1000][1000],mix = 10000,miy = 10000,maax = -11,may = -11;
int ds[1000],dx[5] = {0,0,-1,0,1},dy[5] = {0,1,0,-1,0};

void dfs(int x,int y,int d) {
	mix = min(x,mix);
	miy = min(y,miy);
	maax = max(x,mix);
	may = max(y,may);
	bool t = false;
	for(int i = 1;i <= 4;i++) {
		if(mma[x + dx[d]][y + dy[d]] == 0) {
			cout << "GO" << endl;
			string s;
			cin >> s;
			if(s[0] == 'S') {
				mma[x + dx[d]][y + dy[d]] = 2;
				dfs(x + dx[d],y + dy[d],d);
				t = true;
			}
			else {
				mma[x + dx[d]][y + dy[d]] = 1;
			}
		}
		d = d % 4 + 1;
		cout << "LEFT" << endl;
		string s;
		cin >> s;
	}
	string s;
	cout << "LEFT" << endl;
	cin >> s;
	cout << "LEFT" << endl;
	cin >> s;
	cout << "GO" << endl;
	cin >> s;
	return;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	
	//freopen("p1.in","r",stdin);
	//freopen("p1.out","w",stdout);
	ds['N'] = 1;
	ds['W'] = 2;
	ds['S'] = 3;
	ds['E'] = 4;
	mma[500][500] = 2;
	int x = 500,y = 500,d;
	string s;
	cout << "LEFT" << endl;
	cin >> s;
	d = ds[s[0]];
	dfs(x,y,d);
	cout << "END" << endl;
	for(int i = miy;i <= may;i++) {
		for(int j = mix;j <= maax;j++) {
			if(mma[j][i] == 1) cout << '*';
			else cout << '.';
		}
		cout << endl;
	}
	return 0;
}