#include<stdio.h>
int main ()
{
    int year;
    scanf("%d", &year);
    
    if(years< 1)
    {
        printf("Invalid Input");
    }
    else if (years >= 1 && years <= 5)
    {
        printf("5%%");
    }
    else if(years .=6 && years <= 10)
    {
        printf("10%%");
    }
    else if (years > 10)
    {
        printf("15%%");
    }
    return 0;
}