This is the last group of the letters of the Persian alphabet you need to learn. We put them last because they are infrequent in comparison with most of the previous ones and none of them represent a new sound, i.e. all of them share their sounds with at least one of the letters you already learnt. Even in the letters you have learnt so far, there were letters with identical pronunciations. The reason for this phenomenon is that they originally sound different in the Arabic but Persian speakers pronounce them (and the Arabic loan words containing them) in a simplified way and without maintaining the differences.
All the examples in this part are Arabic names and Arabic loan words. Generally, in pure Persian words and European loan words, the letters “س”, “ت”, “ز”, “ه”, and “ق” are used instead of their homophones.