C312312111133131212111133133313231333133313331322121111331333132231121   >>    C31231211113313121211113313331323133313331333132212111133133313223112   <<    C312312111133131212111133133313231333133313331322121111331333132231123   >>      C312312111133131212111133133313231333133313331322121111331333132231122   >>