C1111233131211111211113313331333133313331333133313331331121111331121311221   >>    C111123313121111121111331333133313331333133313331333133112111133112131122   <<    C1111233131211111211113313331333133313331333133313331331121111331121311223   >>      C1111233131211111211113313331333133313331333133313331331121111331121311222   >>