ay twah oo see
Here's a breakdown:
* ay - like the "a" in "father"
* twah - like the "tw" in "two" and the "ah" in "father"
* oo - like the "oo" in "moon"
* see - like the "see" in "see"
So the whole phrase sounds like: ay twah oo see
Note: The "t" in "toi" is often silent, especially in casual speech.