#include <bits/stdc++.h>
void getRes(char str[]);
int main() {
  int n;
  char str[10];
  while (scanf("%d %s", &n, str) == 2) {
    if (n == 6)
      printf("espeon\n");
    else if (n == 8) {
      printf("vaporeon\n");
    } else {
      if (str[0] == 'j' || str[1] == 'o' || str[3] == 't')
        printf("jolteon\n");
      else if (str[0] == 'f')
        printf("flareon\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[0] == 'g' || str[3] == 'c')
        printf("glaceon\n");
      else if (str[0] == 's' || str[1] == 'y' || str[3] == 'v')
        printf("sylveon\n");
      else {
        if (str[1] == 'l') {
          if (str[3] == 'r')
            printf("flareon\n");
          else
            printf("glaceon\n");
        }
        if (str[2] == 'a') {
          if (str[3] == 'r')
            printf("flareon\n");
          else if (str[3] == 'f')
            printf("leafeon\n");
          else if (str[3] == 'c')
            printf("glaceon\n");
        } else if (str[2] == 'l') {
          if (str[3] == 't')
            printf("jolteon\n");
          else if (str[3] == 'v')
            printf("sylveon\n");
        }
      }
    }
  }
  return 0;
}
void getRes(char str[]) {}
