I have a list of strings.
Each string contains random text and a sequence of numbers and letters that may or may not match a regex.

Example string:

```
"Bla bla bla 123-abc-456 bla bla blaaha"

```

`123-abc-456` will match a regex.

I wish to store all those matching sequences into a new list; sequence only that is, not the bla bla bla.

How could this be done? I need to break out the sequence only using the regex somehow.