#include <stdio.h>

int main() {
    int years;
    
    scanf("%d", %years);
    
    if (years >= 1 && years <= 5){
        printf("5%%");
    }
    else if (years >= 6 && years <= 10) {
        printf("10%%");
    }
    else if (years > 10) {
        printf("15%%");
    }
    else {
        printf("Invalid Input");
    }
    
    return 0
}