C312312111133131212111133133313331333133112113313331333132323321221   >>    C31231211113313121211113313331333133313311211331333133313232332122   <<    C312312111133131212111133133313331333133112113313331333132323321223   >>      C312312111133131212111133133313331333133112113313331333132323321222   >>