grep -oP 'comKw+' source.txt > list.txt

gs="evt">window.open('https://twitter.com/warrenarend', '_blank');</script></button><button dojoType="dijit.form.Button" type="button">26. patriotpariah<script type="dojo/method" event="onClick" args="evt">window.open('https://twitter.com/patriotpariah', '_blank');</script></button><button dojoType="dijit.form.Button" type="button">27. teutates1989<script type="dojo

twitter.com/patriotpariah
twitter.com/warrenarend
…

grep -oP 'com/Kw+'

sed "/com/s/.*/(w+).?$/1/"