Brute

from urllib import request
from time import sleep
from random import randint
import string

lst = []
cnt = 0

def check(s):
  global lst, cnt
  cnt += 1
  print(s)
  if cnt % 10 == 0:
    print("found: ", *lst)
  try:
    obj = request.urlopen('http://dshpr.com/' + s + '.html')
    lst += [s]
    return True
  except Exception:
    return False

st = string.ascii_lowercase
for a in st:
    check(a)
for a in st:
  for b in st:
    check(a + b)
for a in st:
  for b in st:
    for c in st:
      check(a + b + c)
for a in st:
  for b in st:
    for c in st:
      for d in st:
        check(a + b + c + d)