求a_set = set([8, 9, 10, 11, 12, 13])和b_set = {0, 1, 2, 3, 7, 8}的交集，并集，差集，对称差集

a_set = set([8, 9, 10, 11, 12, 13])

b_set = {0, 1, 2, 3, 7, 8}

交集：a_set.intersection(b_set) 或 a_set & b_set，输出结果为 {8}

并集：a_set.union(b_set) 或 a_set | b_set，输出结果为 {0, 1, 2, 3, 7, 8, 9, 10, 11, 12, 13}

差集：a_set.difference(b_set) 或 a_set - b_set，输出结果为 {9, 10, 11, 12, 13}

对称差集：a_set.symmetric_difference(b_set) 或 a_set ^ b_set，输出结果为 {0, 1, 2, 3, 7, 9, 10, 11, 12, 13}