C1111233131211111211113313331333133313232313331333133313331311331331123113111   >>    C111123313121111121111331333133313331323231333133313331333131133133112311311   <<    C1111233131211111211113313331333133313232313331333133313331311331331123113113   >>      C1111233131211111211113313331333133313232313331333133313331311331331123113112   >>