code: def _setup():
      
      s = str.split
      if sys.version_info < (3, 0):
          # noinspection PyUnresolvedReferences
          s = unicode.split
  
      def pop_all(some_dict, some_list):
          for scheme in some_list:
              some_dict.pop(scheme)
      global SCHEMES
      SCHEMES = copy.deepcopy(sanscript.SCHEMES)
      pop_all(SCHEMES, [sanscript.ORIYA, sanscript.BENGALI, sanscript.GUJARATI])
      SCHEMES[HK].update({
          'vowels': s("""a A i I u U R RR lR lRR E ai O au""") + s("""e o"""),
          'marks': s("""A i I u U R RR lR lRR E ai O au""") + s("""e o"""),
          'consonants': sanscript.SCHEMES[HK]['consonants'] + s("""n2 r2 zh""")
      })
      SCHEMES[ITRANS].update({
          'vowels': s("""a A i I u U R RR LLi LLI E ai O au""") + s("""e o"""),
          'marks': s("""A i I u U R RR LLi LLI E ai O au""") + s("""e o"""),
          'consonants': sanscript.SCHEMES[ITRANS]['consonants'] + s("""n2 r2 zh""")
      })
      pop_all(SCHEMES[ITRANS].synonym_map, s("""e o"""))
      SCHEMES[OPTITRANS].update({
          'vowels': s("""a A i I u U R RR LLi LLI E ai O au""") + s("""e o"""),
          'marks': s("""A i I u U R RR LLi LLI E ai O au""") + s("""e o"""),
          'consonants': sanscript.SCHEMES[OPTITRANS]['consonants'] + s("""n2 r2 zh""")
      })
      pop_all(SCHEMES[OPTITRANS].synonym_map, s("""e o"""))
docs: Add a variety of default schemes.