#include <bits/stdc++.h>
int main() {
  int n, i;
  char st[10];
  scanf("%d", &n);
  scanf("%s", &st);
  if (n == 6)
    printf("espeon");
  else if (n == 8)
    printf("vaporeon");
  else {
    if (st[0] == 'u' || st[1] == 'm' || st[2] == 'b')
      printf("umbreon");
    else if (st[0] == 'l' || st[1] == 'e' || st[3] == 'f')
      printf("leafeon");
    else if (st[0] == 'g' || st[3] == 'c')
      printf("glaceon");
    else if (st[0] == 'j' || st[1] == '0' || st[3] == 't')
      printf("jolteon");
    else if (st[0] == 's' || st[1] == 'y' || st[3] == 'v')
      printf("sylveon");
    else
      printf("flareon");
  }
  return 0;
}
