C11111211113313112113313331333133313231311331333133112213331322211111   >>    C1111121111331311211331333133313331323131133133313311221333132221111   <<    C11111211113313112113313331333133313231311331333133112213331322211113   >>      C11111211113313112113313331333133313231311331333133112213331322211112   >>