#include <bits/stdc++.h>
using namespace std;
int kiemra(int n, string s, string ss) {
  int i;
  for (i = 0; i < n; i++) {
    if (s[i] != '.' && s[i] != ss[i]) {
      return 0;
    }
  }
  return 1;
}
int main() {
  string v = "vaporeon", j = "jolteon", f = "flareon", e = "espeon",
         u = "umbreon", l = "leafeon", g = "glaceon", s = "sylveon";
  string in;
  int n;
  cin >> n >> in;
  if (n == 6) {
    if (kiemra(n, in, e) == 1) cout << e;
  } else if (n == 7) {
    if (kiemra(n, in, j) == 1)
      cout << j;
    else if (kiemra(n, in, f) == 1)
      cout << f;
    else if (kiemra(n, in, u) == 1)
      cout << u;
    else if (kiemra(n, in, l) == 1)
      cout << l;
    else if (kiemra(n, in, g) == 1)
      cout << g;
    else if (kiemra(n, in, s) == 1)
      cout << s;
  } else {
    if (kiemra(n, in, v) == 1) cout << v;
  }
}
