There are 48 members in a literary and art group, each of whom knows at least one performing art. Among them, 32 people can ride horses, 28 people can dance, 24 people can fencing, 16 people can ride horses and dance, 14 people can dance and fencing, and 10 people can fencing and horseback riding. A film director wants to choose people who can ride horses, dance, and fencing to be actors. How many actors can the director choose?
某文艺团体有48人，每人至少会一种表演艺术．其中会骑马的32人，会跳舞的28人，会击剑的24人，会骑马又会跳舞的16人，会跳舞又会击剑的14人，会击剑又会骑马的10人．电影导演想选骑马，跳舞，击剑都会的人去当演员，这位导演能选中几个演员？
<gadget id="calculator">48 + 16 + 14 + 10</gadget>
<output>88</output>

<gadget id="calculator">32 + 28 + 24</gadget>
<output>84</output>

<gadget id="calculator">88 - 84</gadget>
<output>4</output>

<result>4</result>