# include <fstream>
using namespace std;
ifstream f ("chatnoir.in");
ofstream g ("chatnoir.out");
int n,m,x,y,i,t;
int main ()
{
	f>>t;
	for (i=1;i<=t;i++)
	{
		f>>n>>m>>x>>y;
		if (x<4 || y<4 || n-x<4 || m-y<4)
			g<<"DA\n";
		else
			g<<"NU\n";
	}
	return 0;
}