To help you get exactly what you need, could you tell me a bit more about what you are trying to do? I can provide more specific guidance if you share:
Frequently used by community uploaders or backup databases to quickly categorize content. In many internet subcultures and file-sharing networks, this single-letter prefix denotes specialized genres, such as "Hentai" or adult-oriented Japanese doujin media, separating it from general-audience software. H-RJ01186021-v1.04.part1.rar