C11111211113313112113313331333133313231311331333133112213331322121311   >>    C1111121111331311211331333133313331323131133133313311221333132212131   <<    C11111211113313112113313331333133313231311331333133112213331322121313   >>      C11111211113313112113313331333133313231311331333133112213331322121312   >>