#include <bits/stdc++.h>
using namespace std;
const long double pi = 3.14159265359;
const long long MAXN = 1e6 + 9;
const long long mdl = 1000000007LL;
int f[1000];
int main() {
  int n, mx = -999999, ans = 0;
  string s, b[100], d;
  cin >> n >> s;
  if (n == 8) {
    cout << "vaporeon";
    return 0;
  } else if (n == 6) {
    cout << "espeon";
    return 0;
  } else {
    b[0] = "jolteon";
    b[1] = "flareon";
    b[2] = "umbreon";
    b[3] = "leafeon";
    b[4] = "glaceon";
    b[5] = "sylveon";
    for (int i = 0; i < 6; i++) {
      d = b[i];
      for (int j = 0; j < 7; j++) {
        if (d[j] == s[j]) f[i]++;
      }
    }
    for (int i = 0; i < 7; i++) {
      if (mx < f[i]) {
        mx = f[i];
        ans = i;
      }
    }
    cout << b[ans];
  }
}
