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  _____      ___                _____     ____    
 /  ___||   / _ \\    ____     |  ___||  |  _ \\  
| // __    / //\ \\  |    \\   | ||__    | |_| || 
| \\_\ || |  ___  || | [] ||   | ||__    | .  //  
 \____//  |_||  |_|| |  __//   |_____||  |_|\_\\  
  `---`   `-`   `-`  |_|`-`    `-----`   `-` --`  
                     `-`

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發送短信 : "Please Q!" : a study on queuing and its negotiated order in Singapore