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

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Text this: Design of a class-Ф inverter