#include <iostream>
#include <cstdlib>
#include <fstream>

int main ()
{
    std::ifstream fin("chatnoir.in");
    std::ofstream fout("chatnoir.out");
    int n,a,b,x,y;

    fin >> n;
    for(int i=1;i<=n;i++)
    {
        fin>>a>>b>>x>>y;
        if(abs(a-x)<3 || abs(b-y)<3 || abs(x-1)<3 || abs(y-1)<3)
        {
            fout<<"DA\n";
        }
        else
        {
            fout<<"NU\n"; 
        }
    }
    return 0;
}