There are 10 digital cards "3", "4" and "5" respectively, and 8 cards are randomly selected so that the sum of their numbers is 33, then how many cards are "3" at most.
数字卡片"3"，"4"，"5"各10张，任意选出8张使它们的数字和是33，则最多有多少张是卡片"3"．
<result>3</result>