C11112331312111112111133133313331333132323213331333133313113213121121   >>    C1111233131211111211113313331333133313232321333133313331311321312112   <<    C11112331312111112111133133313331333132323213331333133313113213121123   >>      C11112331312111112111133133313331333132323213331333133313113213121122   >>