C312312111133131212111133133313231333133313331333131323133313232213111   >>    C31231211113313121211113313331323133313331333133313132313331323221311   <<    C312312111133131212111133133313231333133313331333131323133313232213113   >>      C312312111133131212111133133313231333133313331333131323133313232213112   >>