C11112331333132311331333133313331333112211231211113313331333133313231311233321   >>    C1111233133313231133133313331333133311221123121111331333133313331323131123332   <<    C11112331333132311331333133313331333112211231211113313331333133313231311233323   >>      C11112331333132311331333133313331333112211231211113313331333133313231311233322   >>