C312312111133131212111133133313231333133313331333131333132212231121   >>    C31231211113313121211113313331323133313331333133313133313221223112   <<    C312312111133131212111133133313231333133313331333131333132212231123   >>      C312312111133131212111133133313231333133313331333131333132212231122   >>