#include<stdio.h>
using namespace std;
int t10,i10,x,y,n,m;
int cabs(int y)
{
	if(y>=0) return y;
	return y*-1;
}
int main()
{
freopen("chatnoir.in","r",stdin);
freopen("chatnoir.out","w",stdout);
scanf("%d",&t10);
for(i10=1;i10<=t10;i10++)
{
	scanf("%d",&n);
	scanf("%d",&m);
	scanf("%d",&x);
	scanf("%d",&y);
	if(cabs(n-x)<=2||cabs(m-y)<=2) printf("DA");
	else printf("NU");
	printf("\n");
}
return 0;
}