C312312111133131212111133133313231333133313331322121111331122221   >>    C31231211113313121211113313331323133313331333132212111133112222   <<    C312312111133131212111133133313231333133313331322121111331122223   >>      C312312111133131212111133133313231333133313331322121111331122222   >>