C11112331312111112111133133313331333133112111113331333133313331311331333221121   >>    C1111233131211111211113313331333133313311211111333133313331333131133133322112   <<    C11112331312111112111133133313331333133112111113331333133313331311331333221123   >>      C11112331312111112111133133313331333133112111113331333133313331311331333221122   >>