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 \ \\/ //  \ \\/ //  /_____//  /_   _//  /  ___|| 
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 /_//\_\\    |_||    `__ `     /_____//  \____//  
 `-`  --`    `-`'    /_//      `-----`    `---`   
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發送短信 : The effect of leaderboard in different goal-setting levels