# include <fstream>

using namespace std;

ifstream f("chatnoir.in");
ofstream g("chatnoir.out");

int t, n, m, x, y;

void rezolva()
{
 int min1 = 0, min2 = 0, min3 = 0, min4 = 0, minim = 0 ;
 
 min1 = n - x;
 min2 = x - 1;
 min3 = m - y;
 min4 = y - 1;
 
 minim = min1;
 
 if ( minim > min2 )
	 minim = min2;

	 if ( minim > min3 )
		 minim = min3;
	
		 if ( minim > min4 )
			 minim = min4;
		 
		 //g << min1 << " " << min2 << " " << min3 << " " << min4 << "\n";
		 //g << minim << "\n";
		 
		 if ( minim <= 4 )
			 g << "DA" << "\n";
		 else
			 g << "NU" << "\n";
}

void citire()
{
 int i;
 f >> t;
 for ( i = 1 ; i <= t ; i++ )
 {
	 f >> n >> m >> x >> y;
	 rezolva();
 }
}

int main()
{
 citire();
 return 0;
}