C11112331333132311331333133313331333112211231211113313223313231121121   >>    C1111233133313231133133313331333133311221123121111331322331323112112   <<    C11112331333132311331333133313331333112211231211113313223313231121123   >>      C11112331333132311331333133313331333112211231211113313223313231121122   >>