code: def p_Body(p):
      '''
      Body : Line
           | Body Line
      '''
      if not isinstance(p[1], Body):
          p[0] = Body(None, p[1])
      else:
          p[0] = Body(p[1], p[2]f p_Body(p):
      '''
      Body : Line
           | Body Line
      '''
      if not isinstance(p[1], Body):
          p[0] = Body(None, p[1])
      else:
          p[0] = Body(p[1], p[2])
docs: Body : Line
           | Body Line