C11111211113313112113313331333133313231311331333133312111133112223313223331211   >>    C1111121111331311211331333133313331323131133133313331211113311222331322333121   <<    C11111211113313112113313331333133313231311331333133312111133112223313223331213   >>      C11111211113313112113313331333133313231311331333133312111133112223313223331212   >>