#include <stdio.h>

int main ()
{
    int Q, N, M, x, y;

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

    scanf ("%d", &Q);
    while (Q --)
    {
        scanf ("%d%d%d%d", &N, &M, &x, &y);
        if (x <= 3 || y <= 3 || N - x <= 2 || N - y <= 2)
            printf ("DA\n");
        else
            printf ("NU\n");
    }

    return 0;
}