C11112331312111112111133133313331333132323213331333131332213121   >>    C1111233131211111211113313331333133313232321333133313133221312   <<    C11112331312111112111133133313331333132323213331333131332213123   >>      C11112331312111112111133133313331333132323213331333131332213122   >>