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