#include <iostream>
using namespace std;

void divizor(int a, int &d) {

	for (d = 2; d < a/2; d++)
		if (a % d == 0)
			return;

	d = a;
}



int main() {


	int x,d;
	cin>>x;

	divizor(x,d);
	if (d == x)
		cout<<"DA";
	else
		cout<<"NU";



	return 0;

}