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

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Text this: On kirchhoff's model of parabolic type