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