https://tts.langeek.co/read?text=SQ&hash=04d7d8b8b13b15bcbb901b54ab16b66188588041&lang=en&cache-only=0&driver=googletts&accent=US

https://tts.langeek.co/read?text=eW91&hash=f56bcf5270f366e39076733332387e22b5afd873&lang=en&cache-only=0&driver=googletts&accent=US

These pronouns specify the number and gender of the noun they refer to and act as subjects within sentences.