C11112331312111112111133133313331333133313223223311211331312323221   >>    C1111233131211111211113313331333133313331322322331121133131232322   <<    C11112331312111112111133133313331333133313223223311211331312323223   >>      C11112331312111112111133133313331333133313223223311211331312323222   >>