code: def dist_abs(self, src, tar):
          
          if tar == src:
              return 0
          elif not src:
              return len(tar)
          elif not tar:
              return len(src)
  
          src_bag = Counter(src)
          tar_bag = Counter(tar)
          return max(
              sum((src_bag - tar_bag).values()),
              sum((tar_bag - src_bag).values()),
          )
docs: Return the bag distance between two strings.
  
          Parameters
          ----------
          src : str
              Source string for comparison
          tar : str
              Target string for comparison
  
          Returns
          -------
          int
              Bag distance
  
          Examples
          --------
          >>> cmp = Bag()
          >>> cmp.dist_abs('cat', 'hat')
          1
          >>> cmp.dist_abs('Niall', 'Neil')
          2
          >>> cmp.dist_abs('aluminum', 'Catalan')
          5
          >>> cmp.dist_abs('ATCG', 'TAGC')
          0
          >>> cmp.dist_abs('abcdefg', 'hijklm')
          7
          >>> cmp.dist_abs('abcdefg', 'hijklmno')
          8