#include <stdio.h>

using namespace std;

int main() {
    int T, N, M, X, Y;
    freopen ("chatnoir.in", "r", stdin);
    freopen ("chatnoir.out", "w", stdout);
    scanf ("%d", &T);
    for (int i = 1; i <= T; ++i) {
        scanf ("%d %d %d %d", &N, &M, &X, &Y);
        if (X <= 4 || Y <= 4 || M - Y <= 3 || N - X <= 3)
            printf ("DA\n");
        else printf ("NU\n");
    }
    return 0;
}