C11112331312111112111133133313331333133112111113331333132231121   >>    C1111233131211111211113313331333133313311211111333133313223112   <<    C11112331312111112111133133313331333133112111113331333132231123   >>      C11112331312111112111133133313331333133112111113331333132231122   >>