C11112331312111112111133133313331333133313123313331311331323121221   >>    C1111233131211111211113313331333133313331312331333131133132312122   <<    C11112331312111112111133133313331333133313123313331311331323121223   >>      C11112331312111112111133133313331333133313123313331311331323121222   >>