#include <iostream>
#include <stdio.h>

using namespace std;

const int nr = 6;

int main()
{
    freopen ("chatnoir.in", "r", stdin);
    freopen ("chatnoir.out", "w", stdout);

    int T, N, M, X, Y;

    scanf("%d", &T);
    while(T--)
    {
        scanf("%d %d %d %d", &N, &M, &X, &Y);
        if(X < nr or N - X + 1 < nr or Y < nr or M - Y + 1 < nr)
            printf("DA\n");
        else printf("NU\n");
    }

    return 0;
}