#include <iostream>
#include <cmath>
#include <set>
using namespace std;

int main() {

    multiset<int> ms;

    ms.insert(5);
    ms.insert(2);
    ms.insert(1);
    ms.insert(6);

    if(ms.find(3) != ms.end()) {
        cout << "DA" << endl;
    }
    else {
        cout << "NE" << endl;
    }
    return 0;
}