#include <fstream>

using namespace std;

const int nmax = 1000;

int n, m, x, y, t;

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

void citeste(){

    f>>t;

}

void rezolva(){

    for(int i=1; i<=t; ++i){
        f>>n>>m>>x>>y;
        if (x == n || y == m) g<<"DA"<<"\n";
        //continue;
        else{
        int d = 0;
        d = (n-y) * (n-y) + (m-x) * (m-x);
        d = d / 2;
        if (d <= ((m-x) + (n-y) + 1)) g<<"DA"<<"\n";
        else g<<"NU"<<"\n";
        }
    }

}

int main(){


    citeste();
    rezolva();

    f.close();
    g.close();

    return 0;

}