






from typing import TYPE_CHECKING

from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_torch_available


__lowerCamelCase	:		Any										=   {
    """configuration_nllb_moe""": [
        """NLLB_MOE_PRETRAINED_CONFIG_ARCHIVE_MAP""",
        """NllbMoeConfig""",
    ]
}

try:
       if not is_torch_available():
              raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
       pass
else:
       __lowerCamelCase	:		Union[str, Any]										=   [
           """NLLB_MOE_PRETRAINED_MODEL_ARCHIVE_LIST""",
           """NllbMoeForConditionalGeneration""",
           """NllbMoeModel""",
           """NllbMoePreTrainedModel""",
           """NllbMoeTop2Router""",
           """NllbMoeSparseMLP""",
       ]


if TYPE_CHECKING:
       from .configuration_nllb_moe import (
           NLLB_MOE_PRETRAINED_CONFIG_ARCHIVE_MAP,
           NllbMoeConfig,
       )

       try:
              if not is_torch_available():
                     raise OptionalDependencyNotAvailable()
       except OptionalDependencyNotAvailable:
              pass
       else:
              from .modeling_nllb_moe import (
                  NLLB_MOE_PRETRAINED_MODEL_ARCHIVE_LIST,
                  NllbMoeForConditionalGeneration,
                  NllbMoeModel,
                  NllbMoePreTrainedModel,
                  NllbMoeSparseMLP,
                  NllbMoeTopaRouter,
              )


else:
       import sys

       __lowerCamelCase	:		List[str]										=   _LazyModule(__name__, globals()["""__file__"""], _import_structure, module_spec=__spec__)













def 			A__							(      _a  :					list	):





 '''simple docstring'''







 if len(_a	) <= 1:
  return [tuple(_a	)]

 snake_case__  :    Optional[int]							       =[]

 def generate(_a  :					int		,  _a  :					list	):
  if k == 1:
   res.append(tuple(arr[:]	)	)
   return

  generate(k - 1		,  _a	)

  for i in range(k - 1	):
   if k % 2 == 0:  # k is even
    snake_case__       ,   snake_case__  :    Dict							       =arr[k - 1], arr[i]
   else:  # k is odd
    snake_case__       ,   snake_case__  :    int							       =arr[k - 1], arr[0]
   generate(k - 1		,  _a	)

 generate(len(_a	)		,  _a	)
 return res


if __name__ == "__main__":
       __lowerCamelCase	:		Optional[int]										=   input("""Enter numbers separated by a comma:\n""").strip()
       __lowerCamelCase	:		Any										=   [int(item) for item in user_input.split(""",""")]
       print(heaps(arr))





