Try
Code:
{series:re(([^\s])[^\s]+(\s|$),\1)}{series_index:0>3s| - | - }{title}
Personally, I would prefer
Code:
{series:shorten(4,-,4)}{series_index:0>3s| [|] }{title}
(for some values in the shorten) because the first letter of a single-word series name doesn't tell me enough, and it gets rid of 2 extra spaces.
Edit: If someone wants to reply here, please do so in the sticky thread
Interesting uses of templates, plugboards, and composite fields?