#include 

using namespace std;
int main()
{
    int n;
    cin >> n;
    switch(n) {
        case 1:
            cout << "1" << endl;
            break;
        case 2:
            cout << "2" << endl;
            break;
        case 3:
            cout << "3" << endl;
            break;
        
        default:
            cout << "NE" << endl;
            break;
    }
    return 0;
}