C11112331312111112111133133313331333132323213331333133313331331121111123132121   >>    C1111233131211111211113313331333133313232321333133313331333133112111112313212   <<    C11112331312111112111133133313331333132323213331333133313331331121111123132123   >>      C11112331312111112111133133313331333132323213331333133313331331121111123132122   >>