#include<cstdio>
int T, N, M, X, Y;

int main()
{
	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 <= 2 || N - X <= 2 || Y <= 2 || M - Y <= 2)
			printf("DA\n");
		else 
			printf("NU\n");
	}
	return 0;
}