C1111233131211111211113313331333133313311211111333133313331333133313311223311   >>    C111123313121111121111331333133313331331121111133313331333133313331331122331   <<    C1111233131211111211113313331333133313311211111333133313331333133313311223313   >>      C1111233131211111211113313331333133313311211111333133313331333133313311223312   >>