#include <bits/stdc++.h>
using namespace std;
char s[6][8], t[10];
int n;
bool match(char* a, char* b) {
  for (int i = 0; i < 7; i++)
    if (b[i] != '.' && a[i] != b[i]) return 0;
  return 1;
}
int main() {
  sprintf(s[0], "jolteon");
  sprintf(s[1], "flareon");
  sprintf(s[2], "umbreon");
  sprintf(s[3], "leafeon");
  sprintf(s[4], "glaceon");
  sprintf(s[5], "sylveon");
  scanf("%d%s", &n, t);
  if (n == 6) return 0 * printf("espeon\n");
  if (n == 8) return 0 * printf("vaporeon\n");
  for (int i = 0; i < 6; i++)
    if (match(s[i], t)) return 0 * printf("%s\n", s[i]);
  return 0;
}
