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