C1111233131211111211113313331333133313232313331333133313133213111   >>    C111123313121111121111331333133313331323231333133313331313321311   <<    C1111233131211111211113313331333133313232313331333133313133213113   >>      C1111233131211111211113313331333133313232313331333133313133213112   >>