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

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發送短信 : Non-abelian representations of some sporadic geometries