#include<iostream>
#include<fstream>
using namespace std;
int main(void)
{
	int t,n,m,x,y,min;
	fstream f,g;
	f.open("chatnoir.in",ios::in);
	g.open("chatnoir.out",ios::out);
	f>>t;
	while (t--)
	{
		f>>n>>m>>x>>y;
		
		if ((n-x)>(m-y))
			min=m-y;
			else
				min=n-x;
			if (min==3 && y!=n/2 && x!=m/2 )
				g<<"DA";
				else
			if (min>3 )
				g<<"NU\n";
				else
					g<<"DA\n";
				
	}
}