C11112331333132311331333133313331333112211231211113313233311211323121   >>    C1111233133313231133133313331333133311221123121111331323331121132312   <<    C11112331333132311331333133313331333112211231211113313233311211323123   >>      C11112331333132311331333133313331333112211231211113313233311211323122   >>