C1111233131211111211113313331333133313331333131211111333133313232112311   >>    C111123313121111121111331333133313331333133313121111133313331323211231   <<    C1111233131211111211113313331333133313331333131211111333133313232112313   >>      C1111233131211111211113313331333133313331333131211111333133313232112312   >>