There are 54 cards in a deck, and it is stipulated that at least one card should be taken each time, and a maximum of four cards should be taken each time. Whoever gets the last one will win. If you were asked to take first, how many cards should you take first to ensure you win?
一副扑克牌有54张，规定每次最少拿1张，最多拿4张，谁拿到最后1张谁就获胜．如果让你先拿，你第一次应该先拿多少张牌，才能确保自己获胜？
<result>4</result>