#include <bits/stdc++.h>
using namespace std;
int main(void) {
  char block[8][9] = {"vaporeon", "jolteon", "flareon", "espeon",
                      "umbreon",  "leafeon", "glaceon", "sylveon"};
  int n, len;
  char str[9];
  int count2 = 0;
  int count1 = 0;
  scanf("%d", &len);
  scanf("%s", str);
  for (int i = 0; i < len; ++i)
    if (str[i] == '.') count1++;
  for (int i = 0; i < 8; ++i) {
    if (len != strlen(block[i])) continue;
    for (int j = 0; j < len; ++j)
      if (block[i][j] == str[j]) count2++;
    if (count2 == len - count1) {
      printf("%s\n", block[i]);
      break;
    }
    count2 = 0;
  }
  return 0;
}
