Two people play a matchstick game. The rules of the game are: two people can take turns to remove 1 to 5 matches from a pile of matches, but they must not take them until all the matches are removed. Whoever removes the matches last will win. If there are 55 matches at the beginning, the person who removes the match first can guarantee the win in the game by how many matches are removed for the first time.
两个人做移火柴棍游戏．比赛规则是：两人从一堆火柴中可轮流移走1至5根火柴，但不可以不取，直到移完为止，谁最后移走火柴就算谁赢．如果开始有55根火柴，首先移火柴的人在第一次移走多少根时才能在游戏中保证获胜．
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