C11112331312111112111133133313331333133112111113331311331333133313221221   >>    C1111233131211111211113313331333133313311211111333131133133313331322122   <<    C11112331312111112111133133313331333133112111113331311331333133313221223   >>      C11112331312111112111133133313331333133112111113331311331333133313221222   >>