C11112331312111112111133133313331333133313123313331312111113331333132112122311   >>    C1111233131211111211113313331333133313331312331333131211111333133313211212231   <<    C11112331312111112111133133313331333133313123313331312111113331333132112122313   >>      C11112331312111112111133133313331333133313123313331312111113331333132112122312   >>