crust(thin).
crust(handtossed).
crust(deepdish).
cheese(mozzarella).
cheese(cheddar).
cheese(parmesan).
topping(none).
topping(pepperoni).
topping(sausage).
topping(onion).
topping(pepper).
likes(author, thin, mozzarella, pepperoni).
likes(author, thin, mozzarella, onion).
likes(author, thin, parmesan, pepperoni).
likes(author, thin, parmesan, onion).
likes(author, handtossed, mozzarella, pepperoni).
likes(author, handtossed, mozzarella, onion).
likes(author, handtossed, parmesan, pepperoni).
likes(author, handtossed, parmesan, onion).
likes(ford, handtossed, cheddar, pepperoni).
likes(ford, handtossed, cheddar, pepper).
likes(ford, handtossed, parmesan, pepperoni).
likes(ford, handtossed, parmesan, pepper).
likes(ford, deepdish, cheddar, pepperoni).
likes(ford, deepdish, cheddar, pepper).
likes(ford, deepdish, parmesan, pepperoni).
likes(ford, deepdish, parmesan, pepper).
likes(zaphod, thin, cheddar, pepperoni).
likes(zaphod, thin, cheddar, sausage).
likes(zaphod, thin, cheddar, pepper).
likes(zaphod, thin, parmesan, pepperoni).
likes(zaphod, thin, parmesan, sausage).
likes(zaphod, thin, parmesan, pepper).
likes(zaphod, handtossed, cheddar,  pepperoni).
likes(zaphod, handtossed, cheddar, sausage).
likes(zaphod, handtossed, cheddar, pepper).
likes(zaphod, handtossed, parmesan, pepperoni).
likes(zaphod, handtossed, parmesan, sausage).
likes(zaphod, handtossed, parmesan, pepper).
likes(zaphod, deepdish, cheddar, pepperoni).
likes(zaphod, deepdish, cheddar, sausage).
likes(zaphod, deepdish, cheddar, pepper).
likes(zaphod, deepdish, parmesan, pepperoni).
likes(zaphod, deepdish, parmesan, sausage).
likes(zaphod, deepdish, parmesan, pepper).