user_prompt: ## Instruction:
  You enter an entrance hall with water on the left containing an island with a jumper on it. To the right, high up, there is a platform with a button connected to the exit door. The entrance hall is separated from a center hall by a shield wall. 
  
  The center room has three connecting rooms: the left room, the middle rooms, and the right room, each separated by shield walls. 
  
  The left room contains a button on the floor that tilts a wall below a ball machine. It also has a laser slot in the top left that activates the same ball machine, and a white wall to the right. The center room has a button connected to the shield wall leading to the right room. 
  
  The right room features a large body of water with six jumpers arranged to send cubes in a zigzag pattern. Between them, five vertical blue paths block the way for any cube or ball to be sent across. Above these paths, a white wall is present, and across this wall, five laser slots are positioned, each linked to a corresponding blue vertical path. 
  
  On the left side of the back of the right room, a laser slot is connected to a ball machine located on the right in the back. The final jumper directs towards a gap in the wall, where a blue beam pushes toward a button that is linked to a cube machine at the back of the right room. 
  
  In the center room, a white wall piece is located above the button. By default, this piece is tilted, pointing between the entrance hall and the left room. Pressing the button flattens this piece. 
  
  The middle room consists of two areas. The first middle room has an inactive laser source on the left, a white wall across from it, and a ball slot that is connected to both the laser and the shield wall leading to the center room. Beyond a shield wall inside this first middle room lies the second middle room, which contains a red button on the floor and three white wall areas: one on the ground to the left, one vertically above it on the roof, and one on the side wall to the right. Pressing the button tilts the last wall 45 degrees upwards. Additionally, the button deactivates a shield wall inside a small hole in the wall, which connects the first and second middle rooms.
  
  Below is a candidate solution:
  Step 1: Walk to the center room, from there, select the middle room and go through both doors.
  Step 2: Release the ball from the ball machine by pressing the small button on the right from the entrance.
  Step 3: Shoot a blue portal on the white area of the roof, and an orange portal on the white area on the floor beneath it. Make sure the portals are aligned.
  Step 4: Place the ball in the orange portal and make sure that it keeps falling from the roof to the ground in an infinite loop, otherwise adjust the portals.
  Step 5: Once the ball keeps flying, step on the red button on the floor to tilt the white area on the wall to the right. While the ball is falling (not inside a portal), shoot a new blue portal to the tilted area, such that the ball shoots out of there skewed across the room through the little hole in the wall.
  Step 6: Go one room back to the center. Pick up the ball and place it in the ball slot which activates the laser and removes the shield wall between this room and the center room.
  Step 7: Shoot a blue portal across the wall of the laser.
  Step 8: Go to the center room and shoot an orange portal to the white area in the top left at the wall which activates the laser slot in this room.
  Step 9: Go to the left room (from the entrance perspective) and step on the button to tilt the wall such that the ball machine is redirected to you.
  Step 10: Turn to the left and shoot an orange portal into the white area at the wall to activate the laser slot across.
  Step 11: This will let the ball machine drop a ball which is redirected to you, catch it.
  Step 12: Place the ball on the button so it cannot roll away into the water or shield wall.
  Step 13: Walk out, enter the middle room, shoot a blue portal across the laser.
  Step 14: Walk to the center room, shoot an orange portal at the top left wall to open the room to the left of the entrance (seen from entrance).
  Step 15: Go into the left room and fetch the ball.
  Step 16: Go into the center room and place the ball on the button next to the right room (judged from the entrance), which opens the right room.
  Step 17: Shoot an orange portal at the top left back of the right room which activates the laser slot left behind the five blue path walls. This will let a ball machine drop a ball in the back right of this room.
  Step 18: The ball will be thrown with jumpers in a zig-zag pattern, always interrupted by a blue path.
  Step 19: Shoot the orange portal above each path that needs to be removed by activating the corresponding laser slot at the front of the room close to the roof.
  Step 20: When the ball jumps, remove the first path, then wait until the second jump and remove the second path, and so on.
  Step 21: Finally, the ball gets thrown into the blue beam which activates a cube machine to drop a cube in the back of the room.
  Step 22: Deactivate the first blue path with an orange portal that shoots a laser out to the laser slot across in order to let this cube pass via jumper.
  Step 23: Fetch the ejected cube and bring it to the center room.
  Step 24: Place the cube on the button in the left room to flatten the white wall on top of the center room to point at the entrance hall.
  Step 25: Shoot an orange portal to that white piece of wall to laser into the slot of the entrance hall which removes the shield wall to the entrance hall.
  Step 26: Bring the ball that is not needed anymore from the left room to the entrance hall.
  Step 27: Walk across the new bridge to the jumper and jump up to the exit.
  Step 28: Place the ball on the red button.
  Step 29: Go through the opened exit door. Problem solved.
  
  Please choose from the following options. Your response should end with "The final answer is [answer]." where the [answer] is the choice of A or B.
  A. Correct
  B. InCorrect