The school bought 101 table tennis balls, 67 table tennis bats and 33 table tennis nets. If these three items are equally distributed to each class, the remaining quantities of these three items are the same. How many classes should the school have?
学校买来101个乒乓球，67个乒乓球拍和33个乒乓网．如果把这三种物品平均分给每个班，这三种物品剩下的数量相同．学校应有多少个班．
<result>17</result>