C31231211111133131211113313331333132233133313331312111133221121   >>    C3123121111113313121111331333133313223313331333131211113322112   <<    C31231211111133131211113313331333132233133313331312111133221123   >>      C31231211111133131211113313331333132233133313331312111133221122   >>