code: def hamming_distance(s1, s2):
      
  #     print(s1,s2)
      if len(s1) != len(s2):
          raise ValueError("Undefined for sequences of unequal length")
      return sum(el1 != el2 for el1, el2 in zip(s1.upper(), s2.upper()))
docs: Return the Hamming distance between equal-length sequences