C312312111133131212111133133313231333133313331322121111333122321   >>    C31231211113313121211113313331323133313331333132212111133312232   <<    C312312111133131212111133133313231333133313331322121111333122323   >>      C312312111133131212111133133313231333133313331322121111333122322   >>