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