#include<stdio.h>
int main()
{
    int age;
    //printf("\n");
    scanf("%d",&age);
    if((age<0)||(age>120)
    {
        printf("Invalid input");
    }
    else if(age>18)
    {
        printf("Eligible");
    }
    else
    {
        printf("Not eligible");
    }
    return 0;
}