#include <bits/stdc++.h>
using namespace std;
int main() {
  int len;
  string s, ans, evolve[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                              "umbreon",  "leafeon", "glaceon", "sylveon"};
  cin >> len >> s;
  for (int i = 0; i < 8; i++) {
    if (evolve[i].length() == len) {
      bool valid = true;
      for (int j = 0; j < len; j++) {
        if (s[j] != '.' && evolve[i][j] != s[j]) {
          valid = false;
          break;
        }
      }
      if (valid) ans = evolve[i];
    }
  }
  cout << ans << "\n";
  return 0;
}
