#include<stdio.h>
int main()
{
    int a; 
    sacnf("%d",&a);
    if(a<0)
    {
        printf("Invalid input");
    }
    else if(a<0)
    {
        printf("Great job!");
    }
    else if(a<0)
    {
        printf("Good effort!");
    }
    else 
    {
        printf("Keep trying!");
    }
}