


def   _lowercase(					__a				:						Optional[Any]     ):
							if not head:
														return True
							# split the list to two parts
							a__    ,     a__      =head.next, head
							while fast and fast.next:
														a__      =fast.next.next
														a__      =slow.next
							a__      =slow.next
							a__      =None  # Don't forget here! But forget still works!
							# reverse the second part
							a__      =None
							while second:
														a__      =second.next
														a__      =node
														a__      =second
														a__      =nxt
							# compare two parts
							# second part has the same or one less node
							while node:
														if node.val != head.val:
																					return False
														a__      =node.next
														a__      =head.next
							return True






def   _lowercase(					__a				:						Dict     ):
							if not head or not head.next:
														return True

							# 1. Get the midpoint (slow)
							a__      =a__      =a__      =head
							while fast and fast.next:
														a__    ,     a__      =fast.next.next, slow.next

							# 2. Push the second half into the stack
							a__      =[slow.val]
							while slow.next:
														a__      =slow.next
														stack.append(slow.val     )

							# 3. Comparison
							while stack:
														if stack.pop() != cur.val:
																					return False
														a__      =cur.next

							return True







def   _lowercase(					__a				:						Optional[int]     ):
							if not head or not head.next:
														return True
							a__      ={}
							a__      =0
							while head:
														if head.val in d:
																					d[head.val].append(__a     )
														else:
																					a__      =[pos]
														a__      =head.next
														pos += 1
							a__      =pos - 1
							a__      =0
							for v in d.values():
														if len(__a     ) % 2 != 0:
																					middle += 1
														else:
																					a__      =0
																					for i in range(0    ,     len(__a     )     ):
																												if v[i] + v[len(__a     ) - 1 - step] != checksum:
																																			return False
																												step += 1
														if middle > 1:
																					return False
							return True





from __future__ import annotations

_lowerCAmelCase:						str   				=       '#'




class       lowercase_					:





				def __init__(				self)  -> None:
											a__      ={}





				def 						__UpperCamelCase    (				self       ,  lowercase_)  -> None:
											a__      =self._trie
											for char in text:
																		if char not in trie:
																									a__      ={}
																		a__      =trie[char]
											a__      =True





				def 						__UpperCamelCase    (				self       ,  lowercase_)  -> tuple | list:
											a__      =self._trie
											for char in prefix:
																		if char in trie:
																									a__      =trie[char]
																		else:
																									return []
											return self._elements(lowercase_)





				def 						__UpperCamelCase    (				self       ,  lowercase_)  -> tuple:
											a__      =[]
											for c, v in d.items():
																		a__      =[' '] if c == END else [(c + s) for s in self._elements(lowercase_)]
																		result.extend(lowercase_)
											return tuple(lowercase_)







_lowerCAmelCase:						Optional[int]   				=       Trie()
_lowerCAmelCase:						List[str]   				=       ('depart', 'detergent', 'daring', 'dog', 'deer', 'deal')
for word in words:
	trie.insert_word(word)






def   _lowercase(					__a				:						str     ):
							a__      =trie.find_word(__a     )
							return tuple(string + word for word in suffixes     )






def   _lowercase(					):
							print(autocomplete_using_trie('de'     )     )


if __name__ == "__main__":
	import doctest

	doctest.testmod()
	main()

