Lily is working two summer jobs, making $18 per hour lifeguarding and making $10 per hour washing cars. In a given week, she can work no more than 19 total hours and must earn a minimum of $270. If Lily worked 14 hours lifeguarding, determine all possible values for the number of whole hours washing cars that she must work to meet her requirements. Your answer should be a comma separated list of values. If there are no possible solutions, submit an empty answer.