# 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;
}