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

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發送短信 : Idempotent elements of WP G(2, 2) ∪ {σ id}