C11112331312111112111133133313331333132323133313331312111133112211231   >>    C1111233131211111211113313331333133313232313331333131211113311221123   <<    C11112331312111112111133133313331333132323133313331312111133112211233   >>      C11112331312111112111133133313331333132323133313331312111133112211232   >>