C11112331333132311331333133313331333132313233313331333132213331333133321123121   >>    C1111233133313231133133313331333133313231323331333133313221333133313332112312   <<    C11112331333132311331333133313331333132313233313331333132213331333133321123123   >>      C11112331333132311331333133313331333132313233313331333132213331333133321123122   >>