#include<stdio.h>
int main()
{
    int age;
    scanf("%d",&age);
    if(age>=18)
    {
    printf("Eligible");
    }
    else if(age<18)
    {
    printf("Not Eligible");
    }
    else(age="-%d");
    {
    printf("Invalid input");
    }
    return 0;
}