* bien: "bee-en" (The "e" is pronounced like the "e" in "bed")
* gracias: "gra-thee-as" (The "a" in "gracias" is pronounced like the "a" in "father")
* y: "ee" (Like the "ee" in "see")
* tú: "too" (Like the "oo" in "moon")
Putting it together: "bee-en gra-thee-as ee too"
This phrase is a common way to say "I'm fine, thank you, and you?" in Spanish.