#include <cstdio>

int t, n, m, x, y, a, b;

void swap(int &a, int &b)
{
	int c=a;
	a=b;
	b=c;
}

int min(int a, int b)
{
	if (a>b) a=b;
	return a;
}

int main()
{
	freopen("chatnoir.in","r",stdin);
	freopen("chatnoir.out","w",stdout);
	scanf("%d", &t);
	while (t--)
	{
		scanf("%d %d %d %d", &n, &m, &x, &y);
		b=min(x-1,n-x);
		a=min(y-1,m-y);
		if (a>b)
		{
			swap(a,b);
			swap(n,m);
		}
		if (a<=4) printf("DA\n"); else printf("NU\n");
	}
}