#include <iostream>
//#include <fstream>

using namespace std;

//ifstream fin("pozitie.in");
//ofstream fout("pozitie.out");

int main()
{
    int n;
    cin >> n;
    int x[101], adv = 0;
    for(int i = 1;i <= n;i ++)
        cin >> x[i];
    for(int i = 2;i < n && adv == 0;i ++)
        if((x[i - 1] % 2 == 0 && x[i] % 2 == 0 && x[i + 1] % 2 == 0) || (x[i - 1] % 2 == 1 && x[i] % 2 == 1 && x[i + 1] % 2 == 1))
            adv = 1;
    if(adv)
        cout << "DA";
    else
        cout << "NU";
    return 0;
}