C1111233131211111211113313331333133313311211111333133313331333133311233132221   >>    C111123313121111121111331333133313331331121111133313331333133313331123313222   <<    C1111233131211111211113313331333133313311211111333133313331333133311233132223   >>      C1111233131211111211113313331333133313311211111333133313331333133311233132222   >>