#include <fstream>
using namespace std;

int i,t,x,y,n,m;

int main ()
{
	ifstream f ("chatnoir.in");
	ofstream g ("chatnoir.out");
	f >>t;
	for (i=1; i<=t; i++)
	{
		f >>n>>m>>x>>y;
		if (x-2<4 || y-2<4 || n-x-1<4 || m-y-1<4) g <<"DA"<<endl;
										else  g <<"NU"<<endl;
	}
	f.close();
	g.close();
	return 0;
}