#!/usr/bin/env python
  
  import string
  import hashlib
  from itertools import permutations
  
  WORD_DIGIT = {
          "one":1,
          "two":2,
          "three":3,
          "four":4,
          "five":5,
          "six":6,
          "seven":7,
          "eight":8,
          "nine":9}
  TOKENS = [
          "one",
          "two",
          "three",
          "four",
          "five",
          "six",
          "seven",
          "eight",
          "nine",
          ] + list(string.ascii_lowercase)
  
  SEPARATOR = ", "
  
  STARTING_TEXT = "The SHA256 for this sentence begins with: "
  
  for k in range(2, 6):
      for perm in permutations(TOKENS, k):
          sha_start = ""
          for char in perm:
              if char in WORD_DIGIT:
                  sha_start += str(WORD_DIGIT[char])
              else:
                  sha_start += char
          test_string = STARTING_TEXT + SEPARATOR.join(perm[:-1]) + ", and " + ''.join(perm[-1:]) + "\n"
          checksum = hashlib.new("sha256")
          checksum.update(test_string.encode())
          if checksum.hexdigest().startswith(sha_start):
              print(test_string)