C11112331333132311331333133313331333132311213331333132321123121121   >>    C1111233133313231133133313331333133313231121333133313232112312112   <<    C11112331333132311331333133313331333132311213331333132321123121123   >>      C11112331333132311331333133313331333132311213331333132321123121122   >>