C1111233131211111211113313331333133313232321333133313331333131232233131121111   >>    C111123313121111121111331333133313331323232133313331333133313123223313112111   <<    C1111233131211111211113313331333133313232321333133313331333131232233131121113   >>      C1111233131211111211113313331333133313232321333133313331333131232233131121112   >>