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