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