#include <iostream>
#include <algorithm>
#include <cstdio>
#include <cstring>
using namespace std;

int T, N, M, X, Y;

int main() {
    FILE *f1=fopen("chatnoir.in", "r"), *f2=fopen("chatnoir.out", "w");
    int i, j;

    fscanf(f1, "%d\n", &T);
    while(T--) {
         fscanf(f1, "%d %d %d %d\n", &N, &M, &X, &Y);

         if(X <= 3 || N-X <= 3 || Y <= 3 || N-Y <= 3) {
              fprintf(f2, "DA\n");
         }
         else {
              fprintf(f2, "NU\n");
         }
    }

    fclose(f1); fclose(f2);
    return 0;
}