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

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Text this: P-ranks and automorphism of group divisible designs.