#include <bits/stdc++.h>
using namespace std;
int main() {
  char str[100];
  int n;
  while (scanf("%d", &n) != EOF) {
    scanf("%s", str);
    if (n == 6) {
      printf("espeon\n");
    } else if (n == 8) {
      printf("vaporeon\n");
    } else if (n == 7) {
      if (str[0] == 'j' || str[1] == 'o' || str[3] == 't')
        printf("jolteon\n");
      else if (str[0] == 's' || str[1] == 'y' || str[3] == 'v')
        printf("sylveon\n");
      else if (str[0] == 'u' || str[1] == 'm' || str[2] == 'b')
        printf("umbreon\n");
      else if (str[0] == 'l' || str[1] == 'e' || str[3] == 'f')
        printf("leafeon\n");
      else if (str[1] == 'l' || str[2] == 'a') {
        if (str[0] == 'f' || str[3] == 'r')
          printf("flareon\n");
        else if (str[0] == 'g' || str[3] == 'c')
          printf("glaceon\n");
      } else if (str[3] == 'r') {
        if (str[0] == 'f' || str[1] == 'l' || str[2] == 'a')
          printf("flareon\n");
        else if (str[0] == 'u' || str[1] == 'm' || str[2] == 'b')
          printf("umbreon\n");
      }
    }
  }
  return 0;
}
