Nevaeh is working two summer jobs, making $10 per hour lifeguarding and making $6 per hour walking dogs. In a given week, she can work at most 12 total hours and must earn at least $80. If Nevaeh worked 7 hours lifeguarding, determine all possible values for the number of whole hours walking dogs 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.