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