C11112331312111112111133133313331333133313123313331322123231211   >>    C1111233131211111211113313331333133313331312331333132212323121   <<    C11112331312111112111133133313331333133313123313331322123231213   >>      C11112331312111112111133133313331333133313123313331322123231212   >>