#include<bits/stdc++.h>
#define ll long long
using namespace std;
char mp[305][305];
bool all;
ll x,y,maxx,maxy,minx,miny,vis[305][305],q;
string c,fx;
int main(){
	x=y=maxx=maxy=minx=miny=150;
	while(true){
		q++;
		string f;
		c="LEFT";
		cout<<c<<"\n";
		cin>>f;
		fx=f;
		mp[x][y]='.';
		bool b=true;
		for(ll i=minx-1;i<=maxx+1;i++){
			for(ll j=miny-1;j<=miny+1;j++){
				if(vis[i][j]!=4&&mp[i][j]=='.'){
					b=false;
				}
			}
		}
		if(b)all=true;
		if(all){
			break;
		}else{
			if(q%3==1){
				c="GO";
				cout<<c<<"\n";
				cin>>f;
				if(f=="FAIL"){
					if(fx=="E")mp[x][y+1]='#';
					if(fx=="W")mp[x][y-1]='#';
					if(fx=="S")mp[x+1][y]='#';
					if(fx=="N")mp[x-1][y]='#';
				}else{
					if(fx=="E")y++;
					if(fx=="W")y--;
					if(fx=="S")x++;
					if(fx=="N")x--;
					maxx=max(maxx,x);
					minx=min(minx,x);
					maxy=max(maxy,y);
					miny=min(miny,y);
				}
				vis[x][y]++;
			}else{
				c="LEFT";
				cout<<c<<"\n";
				cin>>f;
			}
		}
	}
	cout<<"END"<<"\n";
	cout<<maxx-minx+3<<" ";
	cout<<maxy-miny+3<<"\n";
	for(ll i=minx-1;i<=maxx+1;i++){
		for(ll j=miny-1;j<=miny+1;j++){
			if(i==minx-1&&j==miny-1)cout<<"#";
			else if(i==minx-1&&j==miny+1)cout<<"#";
			else if(i==maxx+1&&j==miny-1)cout<<"#";
			else if(i==maxx+1&&j==miny+1)cout<<"#";
			else cout<<mp[i][j];
		}
		cout<<"\n";
	}
	return 0;
}