#include <iostream>
using namespace std;

int main()
{
    int x;
    int y;
    cin >> x;
    cin >> y;
    if((x - y < 0 and x - y < -2) or (x + y > 30 and x * y > 50)) {
        cout << "DA" << endl;
    }
    else {
        cout << "NE" << endl;
    }
    return 0;
}