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  _____      ___               _    _    _    _   
 |__  //    / _ \\    ____    | || | || | |  | || 
   / //    | / \ ||  |    \\  | || | || | |/\| || 
  / //__   | \_/ ||  | [] ||  | \\_/ || |  /\  || 
 /_____||   \___//   |  __//   \____//  |_// \_|| 
 `-----`    `---`    |_|`-`     `---`   `-`   `-` 
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發送短信 : Medial representations : mathematics, algorithms and applications