C11112331312111112111133133313331333133313132211312111133132233211311   >>    C1111233131211111211113313331333133313331313221131211113313223321131   <<    C11112331312111112111133133313331333133313132211312111133132233211313   >>      C11112331312111112111133133313331333133313132211312111133132233211312   >>