user_prompt: ## Instruction:
  You enter Room 1, which also contains the exit door on the left.
  
  There is a large Room 2, connected to Room 1 by a door shielded with a blue shield wall. This shield wall does not allow portals to be shot through, but it can be walked through. However, any existing portals vanish when touching the shield. In Room 1, there is an elevated platform in the center with a button that deactivates the shield wall to Room 2 as long as it is pressed.
  
  Room 2 contains another elevated platform with a button that activates an orange (pull) gravitation beam in Room 2 as long as it is pressed.
  
  Additionally, Room 2 has a button on the ground floor that activates a laser as long as it is pressed.
  
  The goal is to open the exit door in Room 1, which is connected to a laser slot inside Room 1.
  
  Select the correct options for each blank. Only output option letters one by one, with the format '{Option 1}{Option 2}{Option 3}{Option 4}{Option 5}, such as 'ABCDE'
  Step 1: ________
  Step 2: Shoot an orange portal beneath the beam and a blue portal on the white wall to the right so that the cube in Room 2 is pulled over the water.
  Step 3: Let the cube be sucked through the portal, then shoot a new blue portal on the left wall.
  Step 4: Step off the button to deactivate the beam, which lets the cube drop through the blue portal onto the floor.
  Step 5: ________
  Step 6: ________
  Step 7: Step on the elevated button and then shoot an orange portal underneath the cube in Room 2.
  Step 8: Catch the cube as it falls from the blue portal and place it on the button in Room 1. Now a critical portal connection between the two rooms is established.
  Step 9: ________
  Step 10: In Room 2, shoot an orange portal underneath the gravitation beam machine.
  Step 11: ________
  Step 12: Once the cube is pulled through the beam to the roof of Room 2, shoot an orange portal on the left wall in Room 2, opposite the still-deactivated laser source.
  Step 13: The cube falls down; place it on the button on the ground floor in Room 2.
  Step 14: Go through the orange portal back to Room 1.
  Step 15: Shoot a blue portal onto the wall opposite the laser slot in Room 1.
  Step 16: This opens the exit door. Go through it. Problem solved.
  
  Please select from the following candidate choices. Your response should end with "The final answer is [answer]." where the [answer] is the choice of options. 
  A. Go to Room 2, as the shield wall is down and allows you to pass without destroying the portal.
  B. Step on the elevated button in Room 2.
  C. Shoot a blue portal in the wall in the back of the final room. Shoot an orange portal into the wall of the left room.
  D. Go to Room 2 via the portals so the shield wall does not destroy the connection between the rooms.
  E. Go to Room 2 and step on the elevated button to activate the gravitation beam.
  F. Go to Room 1 and shoot a blue portal in the roof directly above the elevated button.
  G. Activate the button on the right of the window to teleport the cube into the side room.
  H. First step on the elevated button in Room 1 and then go to the unlocked Room 2 and step on the elevated button to activate the gravitation beam.
  I. Place the cube on the white piece of ground in front of the door leading to Room 1.
  J. Use the jumper with a blue portal on the jumper target and an orange portal on the floor. High up in the air, shoot a blue portal on the tilted area of zone 5 to get thrown through the room and jump on the blue area into the open exit door. Problem solved.