C111123313331323113313331333133313121111133112111133132233131212121   >>    C11112331333132311331333133313331312111113311211113313223313121212   <<    C111123313331323113313331333133313121111133112111133132233131212123   >>      C111123313331323113313331333133313121111133112111133132233131212122   >>