C11112331312111112111133133313331333132313331223213331322121121   >>    C1111233131211111211113313331333133313231333122321333132212112   <<    C11112331312111112111133133313331333132313331223213331322121123   >>      C11112331312111112111133133313331333132313331223213331322121122   >>