#include <fstream>
#include <algorithm>

using namespace std;

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

int main() {
    int testCase, n, m, x, y;

    in >> testCase;
    while(testCase--) {
        in >> n >> m >> x >> y;
        if(min(min(x, n-x+1), min(y, m-y+1)) <= 4) out << "DA\n";
        else out << "NU\n";
    }
    return 0;
}