C11112331333132311331333133313331333132233131331211113313123231323121   >>    C1111233133313231133133313331333133313223313133121111331312323132312   <<    C11112331333132311331333133313331333132233131331211113313123231323123   >>      C11112331333132311331333133313331333132233131331211113313123231323122   >>