#include <bits/stdc++.h>
using namespace std;
char s[10][10] = {"vaporeon", "jolteon", "flareon", "espeon",
                  "umbreon",  "leafeon", "glaceon", "sylveon"};
char ss[10];
int main() {
  int n;
  scanf("%d", &n);
  scanf("%s", ss);
  for (int i = 0; i < 8; i++) {
    int len = strlen(s[i]);
    if (len == n) {
      int j;
      for (j = 0; j < n; j++)
        if (ss[j] != '.' && s[i][j] != ss[j]) break;
      if (j == n) {
        printf("%s\n", s[i]);
      }
    }
  }
  return 0;
}
