C312312111133131212111133133313231333133313331331123121111121111133313232322121   >>    C31231211113313121211113313331323133313331333133112312111112111113331323232212   <<    C312312111133131212111133133313231333133313331331123121111121111133313232322123   >>      C312312111133131212111133133313231333133313331331123121111121111133313232322122   >>