#include<iostream>
using namespace std;
int main()
{
    int i;
    cin>>i;
    if(i<0)
    {
        cout<<"Invalid input";
    }
    else
    {
        if(i%2!==0)
        {
          cout<<"invalid"  ;
        }
        else if(i%2==0)
        {
            cout<<"Leap year";
        }
        
        else
        {
            cout<<"Not a leap year";
        }
    }
}