C11112331312111112111133133313331333133313123313331322233233231   >>    C1111233131211111211113313331333133313331312331333132223323323   <<    C11112331312111112111133133313331333133313123313331322233233233   >>      C11112331312111112111133133313331333133313123313331322233233232   >>