#include <stdio.h>
int t,n,m,a,b,rez;
inline int min(int x,int y)
{
	return x<y ? x : y;
}
int main()
{
	freopen("chatnoir.in","r",stdin);
	freopen("chatnoir.out","w",stdout);
	scanf("%d",&t);
	while (t--)
	{
		scanf("%d%d%d%d",&n,&m,&a,&b);
		rez=min(m-b,b-1);
		rez=min(rez,n-a);
		rez=min(rez,a-1);
		if (rez<=4)
			printf("DA\n");
		else
			printf("NU\n");
	}
	return 0;
}