C312312111133131212111133133313231333133313331333131211111133133313232322121   >>    C31231211113313121211113313331323133313331333133313121111113313331323232212   <<    C312312111133131212111133133313231333133313331333131211111133133313232322123   >>      C312312111133131212111133133313231333133313331333131211111133133313232322122   >>