C11112331312111112111133133313331333132323133313331333133211331311331123311   >>    C1111233131211111211113313331333133313232313331333133313321133131133112331   <<    C11112331312111112111133133313331333132323133313331333133211331311331123313   >>      C11112331312111112111133133313331333132323133313331333133211331311331123312   >>