C111123313331323113313331333133313121111133112111133132233131111   >>    C11112331333132311331333133313331312111113311211113313223313111   <<    C111123313331323113313331333133313121111133112111133132233131113   >>      C111123313331323113313331333133313121111133112111133132233131112   >>