g = File.new("output.csv", "w")
File.open("input.txt", "r") do |f|
  while (line = f.gets)
    line = line.gsub(/\D/, '')
    g.puts line.chomp.to_s[0,3] + "," + line.chomp.to_s[3,3] + "," + line.chomp.to_s[6,4] + ",," + line.chomp.to_s
  end
end
g.close