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

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Text this: On a Class of Constacyclic Codes of Length 4 p s over F p m [ u ] (u a)