#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, flag;
  string name;
  string name2[] = {"vaporeon", "jolteon", "flareon", "espeon",
                    "umbreon",  "leafeon", "glaceon", "sylveon"};
  cin >> n >> name;
  for (int i = 0; i < 8; i++) {
    flag = 0;
    if (n == name2[i].size()) {
      for (int j = 0; j < n; j++) {
        if (name[j] != '.') {
          if (name[j] != name2[i][j]) flag = 1;
        }
      }
      if (flag != 1) cout << name2[i] << endl;
    }
  }
}
