C11112331312111112111133133313331333133313132211312111113231322311   >>    C1111233131211111211113313331333133313331313221131211111323132231   <<    C11112331312111112111133133313331333133313132211312111113231322313   >>      C11112331312111112111133133313331333133313132211312111113231322312   >>