// editor2
#include <iostream>
using namespace std;
int main()
{
    long long year;
    cin>>year;
    if(year<1||year>1000000000){
        cout<< "Invalid input";
    }
    else if((year % 400 == 0)||(year % 4 == 0 && year % 100!=0){
        cout<<"leap year";
    }
    else{
        cout<<"Not a leap year";
    }
    return 0;
}