C111123313331323113313331333133313331323131211113313331311331313331211   >>    C11112331333132311331333133313331333132313121111331333131133131333121   <<    C111123313331323113313331333133313331323131211113313331311331313331213   >>      C111123313331323113313331333133313331323131211113313331311331313331212   >>