C11112331312111112111133133313331333132323213331333131232322221   >>    C1111233131211111211113313331333133313232321333133313123232222   <<    C11112331312111112111133133313331333132323213331333131232322223   >>      C11112331312111112111133133313331333132323213331333131232322222   >>