How to do the thing

This manipulation begins when you board the train to Deling from Galbadia Garden.
The RNG that determines how many poles in each burst pass by the train hallway is the same RNG that determines the Caraway mansion code.

1. Follow Irvine into the hallway with Selphie.
2. When you enter the hallway, you'll see poles passing by the window.
   1. Notice the poles aren't passing by equally. They're going by in bursts.
3. Mash through the dialogue while counting the poles. Once the dialogue is finished, hold down to leave the hallway ASAP.
4. As you count the poles, you'll notice a small break between bursts, that's when you know the burst is finished.
5. An extra long pause is a burst of 0.
6. If the last burst has not finished when you leave the hallway, use a question mark instead of the number.