$ comrak -e strikethrough
Hello ~world~ there.
$ comrak -e strikethrough
This is ~strikethrough~.

As is ~~this, okay~~?

This ~text~~~~ is ~~~~curious~.
$ comrak -e strikethrough,subscript
~~H~2~O~~
$ comrak -e strikethrough
a~~a()~~あ

「~~a」~~a
$ comrak -e strikethrough,cjk-friendly-emphasis
a~~a()~~あ

「~~a」~~a