#include <bits/stdc++.h>
using namespace std;
char s[10][100] = {"vaporeon", "jolteon", "flareon", "espeon",
                   "umbreon",  "leafeon", "glaceon", "sylveon"};
int n;
char S[100];
int main() {
  cin >> n >> S;
  for (int i = 0; i <= 7; i++) {
    int len = strlen(s[i]);
    if (len == n) {
      bool flag = true;
      for (int j = 0; j < n; j++) {
        if (S[j] != '.' && s[i][j] != S[j]) {
          flag = false;
        }
      }
      if (flag) {
        cout << s[i] << endl;
        break;
      }
    }
  }
}
