#45 VerifPrim

#include <iostream>
using namespace std;

int main(){
    int n,prim=1;

    cin >> n;


    if(n<2)
        prim = 0;

    if(n % 2 == 0 && n > 2)
        prim = 0;

   for(int i = 3; i * i <= n; i = i + 2)
        if(n % i == 0)
            prim = 0;


    cout << (prim ? "DA" : "NU") << endl;
    return 0;
}