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