#include <iostream>

using namespace std;

int main()
{
    int n;
    cin >> n;

    if ((n%4 == 0 && n%100 != 0) || n%400 == 0) {
        cout << "szokoev" << endl;
    }
    else {
        cout << "nem szokoev" << endl;
    }

    return 0;
}