#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  string p;
  cin >> n;
  cin >> p;
  if (p[0] == 'j' || p[1] == 'o' || p[3] == 't') {
    cout << "jolteon";
  }
  if (n == 8) {
    cout << "vaporeon" << endl;
  }
  if (p[0] == 'f' || p[3] == 'r') {
    cout << "flareon" << endl;
  }
  if (n == 6) {
    cout << "espeon" << endl;
  }
  if (p[0] == 'u' || p[1] == 'm' || p[2] == 'b') {
    cout << "umbreon" << endl;
  }
  if (p[0] == 'l' || p[1] == 'e' || p[3] == 'f') {
    cout << "leafeon" << endl;
  }
  if (p[0] == 's' || p[1] == 'y' || p[3] == 'v') {
    cout << "sylveon" << endl;
  }
  if (p[0] == 'g' || p[3] == 'c') {
    cout << "glaceon" << endl;
  }
  return 0;
}
