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