// editor5
#include<iostream>
using namespace std;
int main(){
    int year;
    cin>>year;
    
    if(year<1||year>1000000000)
    cout<<"invaild input";
    else if((year % 400 ==0))||((year % 4==0 && year % 100 !=0))
    cout<<"leap year";
    else
    cout<<"not a leap year";
    return 0;
    
}