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