C11112331312111112111133133313331333132323133313331333131113331211212311   >>    C1111233131211111211113313331333133313232313331333133313111333121121231   <<    C11112331312111112111133133313331333132323133313331333131113331211212313   >>      C11112331312111112111133133313331333132323133313331333131113331211212312   >>