C11112331312111112111133133313331333132323213331333133312111133132321231   >>    C1111233131211111211113313331333133313232321333133313331211113313232123   <<    C11112331312111112111133133313331333132323213331333133312111133132321233   >>      C11112331312111112111133133313331333132323213331333133312111133132321232   >>