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def zero_one(state): #?
	start = new_state(False)
	end = new_state(True)

	add_epsilon(start, end)
	add_epsilon(start, state.start)
	add_epsilon(state.end, end)
	state.end.is_end = False

	return AttrDict({ 'start': start, 'end': end })

def oneORmore(nfa): #+
	once = AttrDict(nfa) #copy or deepcopy
	once.end.is_end = False
	return concat(once, closure(nfa))