#include <bits/stdc++.h>
using namespace std;
#pragma comment(linker, "/STACK:64000000")
const int maxn = 18;
const int maxm = 110;
const int maxmask = (1 << maxn) - 1;
const int infi = 1e9 + 7;
const long long infl = 1e18;
const double eps = 1e-6;
const int mod = 1e9 + 7;
string ar[10] = {"vaporeon", "jolteon", "flareon", "espeon",
                 "umbreon",  "leafeon", "glaceon", "sylveon"};
int main() {
  string arz;
  int n;
  cin >> n;
  n = 8;
  cin >> arz;
  for (int i = 0; i < 8; ++i) {
    if (arz.size() != ar[i].size()) {
      continue;
    }
    bool flag = 0;
    for (int j = 0; j < arz.size(); ++j) {
      if (arz[j] == '.') {
        continue;
      } else {
        if (ar[i][j] != arz[j]) {
          flag = 1;
          break;
        }
      }
    }
    if (!flag) {
      cout << ar[i];
      return 0;
    }
  }
  return 0;
}
