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  _  __    _____     ______     ___      _____   
 | |/ //  |  ___||  /_____//   / _ \\   /  ___|| 
 | ' //   | ||__    `____ `   / //\ \\ | // __   
 | . \\   | ||__    /___//   |  ___  ||| \\_\ || 
 |_|\_\\  |_____||  `__ `    |_||  |_|| \____//  
 `-` --`  `-----`   /_//     `-`   `-`   `---`   
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發送短信 : Understanding logical reasoning through computer systems