



'''simple docstring'''

from __future__ import annotations
def       __UpperCamelCase	(       UpperCAmelCase					):
 create_state_space_tree(_A		,					[]		,					0		,					[0 for i in range(len(_A					)					)]					)
def       __UpperCamelCase	(       UpperCAmelCase		,					UpperCAmelCase		,					UpperCAmelCase		,					UpperCAmelCase		,					):

 if index == len(_A					):
  print(_A					)
  return

 for i in range(len(_A					)					):
  if not index_used[i]:
   current_sequence.append(sequence[i]					)
   lowercase__    :   Any						= True
   create_state_space_tree(_A		,					_A		,					index + 1		,					_A					)
   current_sequence.pop()
   lowercase__    :   Dict						= False
__a:			list[int | str]	       =       [3, 1, 2, 4]
generate_all_permutations(sequence)

__a:			list[int | str]	       =       ["A", "B", "C"]





generate_all_permutations(sequence_a)


'''simple docstring'''

import re

from filelock import FileLock


try:
  import nltk

  __a:			Tuple	       =       True
except (ImportError, ModuleNotFoundError):
  __a:			List[Any]	       =       False

if NLTK_AVAILABLE:
  with FileLock(""".lock""") as lock:
    nltk.download("""punkt""", quiet=True)
def       __UpperCamelCase	(       UpperCAmelCase					):
 re.sub('''<n>'''		,					''''''		,					UpperCAmelCase					)  # remove pegasus newline char
 assert NLTK_AVAILABLE, "nltk must be installed to separate newlines between sentences. (pip install nltk)"
 return "\n".join(nltk.sent_tokenize(UpperCAmelCase					)					)

