input: Write a python function to find the 2000 most common words in a document and return them as a dictionary with boolean values indicating their presence in the document.
  assert find_features(['the', 'movie', 'was', 'fantastic', 'and', 'brilliant', 'plot', 'had', 'great', 'twists']) == {'plot': True, 'the': True, 'had': True, 'great': True, 'movie': True, 'brilliant': True, 'twists': True, 'and': True, 'fantastic': True, ...}
  assert find_features(['the', 'movie', 'was', 'terrible', 'and', 'boring', 'with', 'no', 'plot']) == {'plot': True, 'the': True, 'with': True, 'no': True, 'boring': True, 'movie': True, 'terrible': True, 'and': True, ...}
output: def find_features(words):
      from collections import Counter
      common_words = Counter(words).most_common(2000)
      return {word: True for word, _ in common_words}