// editor3
#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 if(years>10){
        printf(15%%\n);
    }
    return 0;
}