C11112331312111112111133133313331333133322131131211113313223311   >>    C1111233131211111211113313331333133313332213113121111331322331   <<    C11112331312111112111133133313331333133322131131211113313223313   >>      C11112331312111112111133133313331333133322131131211113313223312   >>