#include <stdio.h>

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