C111123313121111121111331333133313331333131233133313311232313232233133321311   >>    C11112331312111112111133133313331333133313123313331331123231323223313332131   <<    C111123313121111121111331333133313331333131233133313311232313232233133321313   >>      C111123313121111121111331333133313331333131233133313311232313232233133321312   >>