C11112331312111112111133133313331333132212111133133313331323133313123231211   >>    C1111233131211111211113313331333133313221211113313331333132313331312323121   <<    C11112331312111112111133133313331333132212111133133313331323133313123231213   >>      C11112331312111112111133133313331333132212111133133313331323133313123231212   >>