SreknaGodina

#include <iostream>

using namespace std;

int main()
{
    int g, g1, g2, g3, g4;
    cin >> g;
    g1 = g%10;
    g/=10;
    g2 = g%10;
    g/=10;
    g3 = g%10;
    g/=10;
    g4 = g%10;
    g/=10;
    if(g1==g2 or g1==g3 or g2==g4 or g2==g3 or g4==g1 or g3==g4) cout << "DA";
    else cout << "NE";
    return 0;
}