def next(state,quidam):
	s = state.copy()
	if quidam<3:
		s[quidam] = 1-s[quidam]	
	s[3] = 1-s[3]
	if quidam<3 and s[quidam]!=s[3]:
		raise TypeError()
	if (s[0]==s[1]!=s[3]) or (s[1]==s[2]!=s[3]):
		raise TypeError()
	if s==[1,1,1,1]:
		raise StopIteration()
	return s