Yes, you have to join WW to get a list of the foods.
You can eat all the fruits and vegetables you want, brown rice, soy products, fat free dairy products, lean meats of any kind, eggs. No sugar, bread (even if it's whole wheat because of it's "high abuse potential").
To get a complete list you jave to join WW. They often have deals where the initiation fee is waived or reduced. You can check their website.