C11112331312111112111133133313331333132323133313331333131312111133132233313121   >>    C1111233131211111211113313331333133313232313331333133313131211113313223331312   <<    C11112331312111112111133133313331333132323133313331333131312111133132233313123   >>      C11112331312111112111133133313331333132323133313331333131312111133132233313122   >>