add_school university_of_michigan 3 3 erin_jones john_smith dave_roberts insert_student_into_school_preference_list university_of_michigan joe_miller dave_roberts print_school_preferences university_of_michigan add_student erin_jones 3 duke_university university_of_michigan university_of_california_san_francisco remove_school_from_student_preference_list erin_jones university_of_california_san_francisco print_student_preferences erin_jones add_school duke_university 1 3 john_smith erin_jones dave_roberts add_school university_of_california_san_francisco 2 3 erin_jones joe_miller john_smith add_student john_smith 1 university_of_michigan add_student dave_roberts 3 duke_university university_of_michigan university_of_california_san_francisco add_student joe_miller 1 duke_university perform_matching print_school_enrollments print_student_decisions