#include<stdio.h>
int main()
{
    
    int age;
    scanf("%d",&years);
    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;
    }