C31231211111133131211113313331333133313121111121133132233132321   >>    C3123121111113313121111331333133313331312111112113313223313232   <<    C31231211111133131211113313331333133313121111121133132233132323   >>      C31231211111133131211113313331333133313121111121133132233132322   >>