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