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

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發送短信 : On a class of constacyclic codes of length 4ps over ð ½pm + uð ½pm