C11112331312111112111133133313331333133313123313331323233233121   >>    C1111233131211111211113313331333133313331312331333132323323312   <<    C11112331312111112111133133313331333133313123313331323233233123   >>      C11112331312111112111133133313331333133313123313331323233233122   >>