#include <stdio.h>
#include <stdbool.h>

int main (void) {
  const int VOTING_AGE = 18;
  int age;
  bool eligible;
  scanf ("%d", &age);
  eligible = age >= VOTING_AGE;
  if (eligible)
    printf ("Eligible to vote.\n");
  else
    printf ("Not eligible to vote.\n");
  return 0;
}