C11111211113313112113313331333133313231311331333133312133313232323213123231   >>    C1111121111331311211331333133313331323131133133313331213331323232321312323   <<    C11111211113313112113313331333133313231311331333133312133313232323213123233   >>      C11111211113313112113313331333133313231311331333133312133313232323213123232   >>