Maturenl.23.07.19.petra.x.xxx.1080p.hevc.x265.p...

or ...Petra.X.XXX.1080p.HEVC.x265.MeGusta (or another release group)

MatureNL.23.07.19.Petra.X.XXX.1080p.HEVC.x265.P... MatureNL.23.07.19.Petra.X.XXX.1080p.HEVC.x265.P...

Based on the pattern you provided:

It looks like you’re trying to complete a filename that follows a common for HD video files. from a download or metadata)

MatureNL.23.07.19.Petra.X.XXX.1080p.HEVC.x265.P2P.mkv as the P... could be Part1

The most logical completion would be:

If you actually have a truncated filename and want to find or verify the full name (e.g., from a download or metadata), you’ll need to check the original source, as the P... could be Part1 , P2P , or even a typo of -P for a group.