#include <fstream>
using namespace std;

ifstream fin("chatnoir.in");
ofstream fout("chatnoir.out");

int n,a,b,c,d;

int main()
{
    fin>>n;
    while(n--)
    {
        fin>>a>>b>>c>>d;
        if(a-c<=2||b-d<=2)
        {
            fout<<"DA\n";
            continue;
        }
        fout<<"NU\n";
    }

    return 0;
}