# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression.
sed -E 's/.*\.(\w{3,})$/$1/gmi;t' <<< "http://www.w3schools.com/jsref/jsref_regexp_exec.asp
https://translate.google.com/#en/pt/Thank%20you%20Engr!%20That%20is%20awesome.php
www.facebook.com/index.asp"
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html