發送短信 : A k-ary Generalization of the Fibonacci Cubes

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