text: # hamming distance - he Hamming distance between two strings of equal length
  # is the number of positions at which the corresponding symbols are different
  
  def hamming(s1,s2): 
      if len(s1) != len(s2): 
          return ("length of the two strings are not equal") 
      else:
          sum=0
          for  in :
            #print "c1 -------------",c1
            #print "c2 ----------",c2
            
          return sum
  
  print hamming("karolin","kathoin")  # 3
  print hamming("1011100","1111111")  # 3
  print hamming("1238273837","463743746") #length of the two strings are not equal
  
  