#include <bits/stdc++.h>
using namespace std;
const string Pok[8] = {"vaporeon", "jolteon", "flareon", "espeon",
                       "umbreon",  "leafeon", "glaceon", "sylveon"};
int N;
char S[10];
bool Out[10];
int main() {
  scanf("%i\n", &N);
  gets(S);
  for (int i = 0; i < 8; ++i)
    if (Pok[i].length() != N) Out[i] = 1;
  for (int i = 0; i < N; ++i)
    if (S[i] != '.')
      for (int j = 0; j < 8; ++j)
        if (Pok[j][i] != S[i]) Out[j] = 1;
  for (int i = 0; i < 8; ++i)
    if (!Out[i]) {
      for (int j = 0; j < N; ++j) printf("%c", Pok[i][j]);
      return 0;
    }
}
