Angel and his children went into a grocery store and where they sell peaches for $0. 75 each and mangos for $1. 25 each. Angel has $15 to spend and must buy no less than 12 peaches and mangos altogether. If angel decided to buy 6 mangos, determine all possible values for the number of peaches that he could buy. Your answer should be a comma separated list of values. If there are no possible solutions, submit an empty answer.