#include<fstream>
#include<iostream>
#include<cassert>
#include<cstdio>
#include<algorithm>
using namespace std;
int main()
{
    ifstream fin("chatnoir.in");
    ofstream fout("chatnoir.out");
    int T,n,m,x,y;
    fin>>T;
    while(T--)
    {
        fin>>n>>m>>x>>y;
        if((x==1||y==1||x==n || y==m ||abs(x-y)<=1) && !(x==y && x==n/2))
            fout<<"DA\n";
//        else if(abs(abs(n-x)==y+1)<=1 || abs(abs(n-y)-x+1)<=1)
//            fout<<"DA\n";
        else
            fout<<"NU\n";
    }
    return 0;
}