C111123313121111121111331333133313331323132333133313121111331333132233132212131   >>    C11112331312111112111133133313331333132313233313331312111133133313223313221213   <<    C111123313121111121111331333133313331323132333133313121111331333132233132212133   >>      C111123313121111121111331333133313331323132333133313121111331333132233132212132   >>