#include <cstdio>

using namespace std;

int N, M, X, Y, T;

int main()
{
    freopen ("chatnoir.in", "r", stdin);
    freopen ("chatnoir.out", "w", stdout);
    scanf ("%d", &T);
    for (; T>0; --T)
    {
        scanf ("%d %d %d %d", &N, &M, &X, &Y);
        if (N-X+1>=4 and X>=4 and M-Y+1>=4 and Y>=4)
        {
            printf ("NU\n");
        }
        else
        {
            printf ("DA\n");
        }
    }
    return 0;
}