C11111211113313112113313331333133313231311331333133331333133313221333132212121   >>    C1111121111331311211331333133313331323131133133313333133313331322133313221212   <<    C11111211113313112113313331333133313231311331333133331333133313221333132212123   >>      C11111211113313112113313331333133313231311331333133331333133313221333132212122   >>