C11111211113313112113313331333133313231311331333133311331313213221   >>    C1111121111331311211331333133313331323131133133313331133131321322   <<    C11111211113313112113313331333133313231311331333133311331313213223   >>      C11111211113313112113313331333133313231311331333133311331313213222   >>