#include <stdio.h>
int main()
{
    int hour;
    scanf('%d', &hour);
    if (hour >=0 && hour <= 11) {
        printf("Good morning");
        } else if (hour >= 12 && hour <=16);{
            printf("Good afternoon");
        } else if (hour >= 17 && hour <= 23) {
            print("Good morning");
            } else {
                printf("invalid input");
                return 0;
        }
        
printf