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