#include<cstdio>
using namespace std;

FILE* in=fopen("chatnoir.in", "r");
FILE* out=fopen("chatnoir.out", "w");

int main()
{
	int t;
	fscanf(in, "%d", &t);
	
	for(int i=1; i<=t; ++i)
	{
		int n, m, x, y;
		fscanf(in, "%d%d%d%d", &n, &m, &x, &y);
		if(x-1<5||n-x<5||y-1<5||n-y<5) fprintf(out, "DA\n");
		else fprintf(out, "NU\n");
	}
}