To play this document inside your browser use ALT-N and ALT-P. If you get stack overflow errors, try to use Google Chrome or Chromium with the command line option --js-flags="--harmony-tailcalls".

You can save your edits inside your browser and load them back (edits are also saved when you close the window). Finally you can download the file for offline editing.

Please wait until loaded (something like 10 seconds) then press ALT-N and ALT-P to process the document forward and backward. Note: the first line takes a few seconds to run.