C111123313121111121111331333133313331333132232233131211113313112211231311   >>    C11112331312111112111133133313331333133313223223313121111331311221123131   <<    C111123313121111121111331333133313331333132232233131211113313112211231313   >>      C111123313121111121111331333133313331333132232233131211113313112211231312   >>