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

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發送短信 : The capacity regions of some classes of deterministic relay channels