https://tts.langeek.co/read?text=b25l&hash=13a971773bd29ae2c54c9d01372c63ef0bd38e4a&lang=en&cache-only=0&driver=googletts&accent=US

https://tts.langeek.co/read?text=dHdv&hash=c6f3ebf2540bd40487d947bb573cdd6b0aa88e2d&lang=en&cache-only=0&driver=googletts&accent=US

This category includes single-digit English numbers from 1 to 9.