C11112331312111112111133133313331333133313223223313331333233231231   >>    C1111233131211111211113313331333133313331322322331333133323323123   <<    C11112331312111112111133133313331333133313223223313331333233231233   >>      C11112331312111112111133133313331333133313223223313331333233231232   >>