i used ruby `2.6.0` to run.
bundle install
ruby taxonomy.rb input_file_name output_file_name
Make sure that your input_file_name put same as taxonomy.rb file.
your input file name as: taxonomy-with-ids.en-US.txt
and you want to make output file name as: hello.rb or text.txt or hi.csv,...
ruby taxonomy.rb taxonomy-with-ids.en-US.txt hello.rb
or
ruby taxonomy.rb taxonomy-with-ids.en-US.txt text.txt
or
ruby taxonomy.rb taxonomy-with-ids.en-US.txt hi.cs