The owners of a newly opened ice cream shop are trying to decide what flavors to offer, so they surveyed 50 people about whether they would like coconut, watermelon, or papaya flavored icre cream. 30 people said they like coconut. 15 said they would like watermelon. 16 said they would like papaya. 5 people said they would like all three flavors and ten people said they would not like any of these flavors. 7 people said they would like coconut ice cream and papaya ice cream, and 11 people said they would like watermelon ice cream and papya ice cream. How many people said they would like coconut only out of these three flavors?