#include <fstream>
using namespace std;
ifstream f("chatnoir.in");
ofstream g("chatnoir.out");
int nr1,nr2,nr3,nr4,i,n,m,x,y;
int main ()
{
	f>>n;
	for (i=1;i<=n;i++)
	{
		f>>n>>m>>x>>y;
		nr1=x-2;
		nr2=y-2;
		nr3=n-x-1;
		nr4=m-y-1;
		if (nr1<4 || nr2<4 || nr3<4 || nr4<4) g<<"DA"<<'\n'; else g<<"NU"<<'\n';
	}
return 0;
}