Autopopulate Playlist with Shoot 'Em Up

[Pixelfetish]

It seems my  "Shoot 'Em Up"-Playlist (Arcade Shoot Em Ups.xml) has been destroyed by the last update. I did find ALL Launchbox games in there.
So, I grabbed the list from "LaunchBox\Data\Playlists" and deleted all games entries.
Now, I want to auto-populate it. But the problem seems to be the rules:

  <PlaylistFilter>
    <Value>Arcade</Value>
    <FieldKey>Platform</FieldKey>
    <ComparisonTypeKey>EqualTo</ComparisonTypeKey>
  </PlaylistFilter>
  <PlaylistFilter>
    <Value>Shoot 'Em Up</Value>
    <FieldKey>Genre</FieldKey>
    <ComparisonTypeKey>Contains</ComparisonTypeKey>
  </PlaylistFilter>

This does not fill the playlist. Is there any overview of all valid MAME genres and how to use them?
Thanks for any help.

[Pixelfetish]

Found it:
it is now
Shooter / Flying Vertical
Shooter / Flying Horizontal