C11112331312111112111133133313331333132323133313331333133313123133112121   >>    C1111233131211111211113313331333133313232313331333133313331312313311212   <<    C11112331312111112111133133313331333132323133313331333133313123133112123   >>      C11112331312111112111133133313331333132323133313331333133313123133112122   >>