require 'json'

meta_json = ""

File.open("meta.json", "r") do |f|
  meta_json = f.read
end

meta = JSON.parse(meta_json)

cp_array = meta.map{|m| m["codepoint"]}.sort

cp_list = ""

cp_array.each do |i|
  cp_list += "#{i},"
end

puts cp_list