interface Shape
  method area() as word
end interface

class Box implements Shape
  private word side

  public method init(s as word, t as byte)
    side = s + t
  end method

  public method area() as word
    return side
  end method

  public method scale(f as byte) as word
    if f = 0
      return 0
    end if
  end method

  public method pick(f as boolean) as word
    while f
      return 1
    end while
  end method

  public method both(f as boolean) as word
    if f
      return 1
    else
      return
    end if
  end method

  public method none()
    return 5
  end method

  public method wrong() as boolean
    return side
  end method
end class

class Bare
end class

program Main
  var b as Box
  var s as Shape
  var w as word
  b = new Box(1)
  b = new Box(1, 2, 3, 4)
  b = new Box(1, true)
  b = new Box(-1, 2)
  w = b.scale()
  w = b.scale(1, 2)
  w = s.area(5)
  s = new Shape()
  s = new Bare(1)
  return 1
  return
end program