C11112331312111112111133133313331333132323213331333131211331333123312231   >>    C1111233131211111211113313331333133313232321333133313121133133312331223   <<    C11112331312111112111133133313331333132323213331333131211331333123312233   >>      C11112331312111112111133133313331333132323213331333131211331333123312232   >>