#include<stdio.h>
int main()
{
    int years;
    scanf("%d",&years);
    
    if(years>=1&&years<=5)
    {
        print("5%%")
    }
    else if(years>=6&&years<=10)
    {
        printf("10%%")
    }
    else if(years<1)
    {
        printf("Invalid input");
    }
    else
    {
        printf("15%%")
    }
}