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class EXPERT

    FIND_CHAIN_FOR_POS_FILTER_PIPELINE = 

      [ 

        :no_filter,

        :filter_by_etkz_e,

        :filter_chain_in_chain,

      ].each

    def find_chain_for_pos(sw_lines_for_module)

      br = '4711'

      FIND_CHAIN_FOR_POS_FILTER_PIPELINE.rewind        

      begin

        while true

          puts "before"          

          filter_method_symb = FIND_CHAIN_FOR_POS_FILTER_PIPELINE.next

          puts "after"

          sw_lines_for_module = NVP.send(filter_method_symb, br, sw_lines_for_module) 

          # LOG.trace { "SW Lines left after filter #{filter_method_symb}:\n#{SwRec.show_array(sw_lines_for_module)}"}

        end

      rescue StopIteration

        puts "done...."

        # LOG.trace "Could not find unique GRPID"

      end

      nil                                                                                             

    end

end

class Cnt

  def initalize(n)

    @c=n

  end

  def decr

    @c -= 1

  end

  def to_s

    @c.to_s

  end

end

module NVP

  extend self

  def no_filter(b,a)

    [[a.size, b.nil?]] * (a.size)

  end

  def filter_by_etkz_e(x,y)

    no_filter(x,y)

  end

  def filter_chain_in_chain(x,y)

    filter_by_etkz_e(x,y)

  end

  def mu?(cn)

    cn.decr > 0

  end

end

newc = (ARGV[0]||1).to_i

c = EXPERT.new

newc.times do |cnt| 

  # puts "#{cnt} out of #{newc}"

  puts cnt

  c.find_chain_for_pos(%w(a b c d e))  

end