code: def baseN(num, b, numerals="0123456789abcdefghijklmnopqrstuvwxyz"):
      
      return ((num == 0) and numerals[0]) or \
          (baseN(num // b, b, numerals).lstrip(numerals[0]) + numerals[num % b])
docs: This prototype should be used to create
      an iban object from iban correct string
  
      @param {String} iban