C111123313331323113313331333133313121111133112111133132233112331313311   >>    C11112331333132311331333133313331312111113311211113313223311233131331   <<    C111123313331323113313331333133313121111133112111133132233112331313313   >>      C111123313331323113313331333133313121111133112111133132233112331313312   >>