old_contents: # coding: utf-8
  
  """
  Mission simulation.
  """
  
  from rover import Plateau, Rover, Heading, Command
  
  
  if __name__ == '__main__':
      instructions = open('instructions.txt', 'r')
  
      # Prepare the plateau to landings.
      data = instructions.readline().split()
      x, y = map(int, data)
      plateau = Plateau(x, y)
  
      # Deploy Rovers on the plateau.
      for data in instructions:
          x, y, heading = data.split()
          rover = Rover(int(x), int(y), getattr(Heading, heading), plateau)
  
          # Parse and run instructions.
          commands = instructions.readline().strip()
          for cmd in commands:
              command = getattr(Command, cmd)
              rover.execute(command)
  
          print(rover)
  
      instructions.close()
  
new_contents: # coding: utf-8
  
  """
  Mission simulation.
  """
  
  from rover import Plateau, Rover, Heading, Command
  
  
  if __name__ == '__main__':
      instructions = open('instructions.txt', 'r')
  
      # Prepare the plateau to landings.
      data = instructions.readline().split()
      x, y = map(int, data)
      plateau = Plateau(x, y)
  
      # Deploy Rovers on the plateau.
      for data in instructions:
          x, y, heading = data.split()
          rover = Rover(int(x), int(y), getattr(Heading, heading), plateau)
  
          # Parse and run instructions.
          commands = instructions.readline().strip()
          for cmd in commands:
              command = getattr(Command, cmd, None)
              rover.execute(command)
  
          print(rover)
  
      instructions.close()
  
subject: Fix to deal with invalid commands.