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

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Text this: On Perfect Cayley Graphs