C312312111133131212111133133313231333133313331331121333132212111   >>    C31231211113313121211113313331323133313331333133112133313221211   <<    C312312111133131212111133133313231333133313331331121333132212113   >>      C312312111133131212111133133313231333133313331331121333132212112   >>