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   _____    _____     ______     ___      ____    
  / ___//  |  ___||  /_____//   / _ \\   |  _ \\  
  \___ \\  | ||__    `____ `   | / \ ||  | |_| || 
  /    //  | ||__    /___//    | \_/ ||  | .  //  
 /____//   |_____||  `__ `      \___//   |_|\_\\  
`-----`    `-----`   /_//       `---`    `-` --`  
                     `-`

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發送短信 : The Fermi-Pasta-Ulam problem : a status report