C11111211113313112113313331333133313231311331333133112213231322123311   >>    C1111121111331311211331333133313331323131133133313311221323132212331   <<    C11111211113313112113313331333133313231311331333133112213231322123313   >>      C11111211113313112113313331333133313231311331333133112213231322123312   >>