C111123313331323113313331333133313121111133112111133132233313123231   >>    C11112331333132311331333133313331312111113311211113313223331312323   <<    C111123313331323113313331333133313121111133112111133132233313123233   >>      C111123313331323113313331333133313121111133112111133132233313123232   >>