發送短信

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

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發送短信 : Inefficiency in the Shadow of Unobservable Outside Options