# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression.
sed -E 's/http(?:s)?\:\/\/boards\.4chan\.org\/([a-z]*)\/thread\/([0-9]*)(?:\#[0-9a-z]*)?/Thread $2 on mlp/g;t' <<< "https://boards.4chan.org/mlp/thread/5
http://boards.4chan.org/b/thread/570277846
https://boards.4chan.org/mlp/thread/19865655#q19865655
https://boards.4chan.org/mlp/thread/19775771
https://boards.4chan.org/co/thread/65737750#q65737750"
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