'''simple docstring'''





def 	lowerCAmelCase_				(					snake_case_       : list			)    ->      bool:


     '''simple docstring'''




     if not isinstance(snake_case_					,    snake_case_			):
          raise ValueError("Input series is not valid, valid series - [2, 4, 6]"			)
     if len(snake_case_			) == 0:
          raise ValueError("Input list must be a non empty list"			)
     if len(snake_case_			) == 1:
          return True
     UpperCAmelCase_           =   series[1] - series[0]
     for index in range(len(snake_case_			) - 1			):
          if series[index + 1] - series[index] != common_diff:
               return False
     return True





def 	lowerCAmelCase_				(					snake_case_       : list			)    ->      float:


     '''simple docstring'''




     if not isinstance(snake_case_					,    snake_case_			):
          raise ValueError("Input series is not valid, valid series - [2, 4, 6]"			)
     if len(snake_case_			) == 0:
          raise ValueError("Input list must be a non empty list"			)
     UpperCAmelCase_           =   0
     for val in series:
          answer += val
     return answer / len(snake_case_			)


if __name__ == "__main__":
    import doctest

    doctest.testmod()











"""simple docstring"""




a						: Any     	=			{
    '''a''': '''AAAAA''',
    '''b''': '''AAAAB''',
    '''c''': '''AAABA''',
    '''d''': '''AAABB''',
    '''e''': '''AABAA''',
    '''f''': '''AABAB''',
    '''g''': '''AABBA''',
    '''h''': '''AABBB''',
    '''i''': '''ABAAA''',
    '''j''': '''BBBAA''',
    '''k''': '''ABAAB''',
    '''l''': '''ABABA''',
    '''m''': '''ABABB''',
    '''n''': '''ABBAA''',
    '''o''': '''ABBAB''',
    '''p''': '''ABBBA''',
    '''q''': '''ABBBB''',
    '''r''': '''BAAAA''',
    '''s''': '''BAAAB''',
    '''t''': '''BAABA''',
    '''u''': '''BAABB''',
    '''v''': '''BBBAB''',
    '''w''': '''BABAA''',
    '''x''': '''BABAB''',
    '''y''': '''BABBA''',
    '''z''': '''BABBB''',
    ''' ''': ''' ''',
}


a						: List[Any]     	=			{value: key for key, value in encode_dict.items()}






def       _SCREAMING_SNAKE_CASE		(	_lowercase						:    str					) ->str:






	'''simple docstring'''






	a      :		int	=				""
	for letter in word.lower():
		if letter.isalpha() or letter == " ":
			encoded += encode_dict[letter]
		else:
			raise Exception("encode() accepts only letters of the alphabet and spaces"					)
	return encoded






def       _SCREAMING_SNAKE_CASE		(	_lowercase						:    str					) ->str:






	'''simple docstring'''






	if set(_lowercase					) - {"A", "B", " "} != set():
		raise Exception("decode() accepts only 'A', 'B' and spaces"					)
	a      :		Optional[Any]	=				""
	for word in coded.split():
		while len(_lowercase					) != 0:
			decoded += decode_dict[word[:5]]
			a      :		List[Any]	=				word[5:]
		decoded += " "
	return decoded.strip()


if __name__ == "__main__":
		from doctest import testmod

		testmod()


