#include <bits/stdc++.h>

using namespace std;

ifstream fin  ("chatnoir.in");
ofstream fout ("chatnoir.out");

int teste;
int n, m, x, y;

int main (){
    fin>>teste;
    while(teste--){
        fin>>n>>m>>x>>y;
        fout<<"NU\n";
    }
    return 0;
}