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

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Text this: Eigenvalues of the matching derangement graph