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   _____   _    _                ___      _____   
  / ___// | || | ||     ___     / _ \\   |__  //  
  \___ \\ | || | ||    /   ||  | / \ ||    / //   
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`-----`     `---`       -|_||   `---`    `-----`  
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發送短信 : Many-to-one stable matching: Geometry and fairness