code: def build(self, align_path):
          
          file = open(align_path, 'r')
          lines = file.readlines()
          file.close()
          # words: list([op, ed, word])
          words = []
          for line in lines:
              _op, _ed, word = line.strip().split(' ')
              if word not in Align.skip_list:
                  words.append((int(_op), int(_ed), word))
          self.words = words
          self.n_words = len(words)
          self.sentence_str = " ".join([w[2] for w in self.words])
          self.sentence_length = len(self.sentence_str)
docs: Build the align array