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

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Text this: Solvable join of graphs