def get_word_pattern(word: str) -> str:
 """
 >>> get_word_pattern("pattern")
 '0.1.2.2.3.4.5'
 >>> get_word_pattern("word pattern")
 '0.1.2.3.4.5.6.7.7.8.2.9'
 >>> get_word_pattern("get word pattern")
 '0.1.2.3.4.5.6.7.3.8.9.2.2.1.6.10'
 """
 word = word.upper()
 next_num = 0
 letter_nums = {}
 word_pattern = []

 for letter in word:
 if letter not in letter_nums:
 letter_nums[letter] = str(next_num)
 next_num += 1
 word_pattern.append(letter_nums[letter])
 return ".".join(word_pattern)


if __name__ == "__main__":
 import pprint
 import time

 start_time = time.time()
 with open("dictionary.txt") as in_file:
 word_list = in_file.read().splitlines()

 all_patterns: dict = {}
 for word in word_list:
 pattern = get_word_pattern(word)
 if pattern in all_patterns:
 all_patterns[pattern].append(word)
 else:
 all_patterns[pattern] = [word]

 with open("word_patterns.txt", "w") as out_file:
 out_file.write(pprint.pformat(all_patterns))

 total_time = round(time.time() - start_time, 2)
 print(f"Done! {len(all_patterns):,} word patterns found in {total_time} seconds.")
 # Done! 9,581 word patterns found in 0.58 seconds.