The Bank

1. The curtain door leads to four locations.
2. It is completely deterministic (i.e., non-random).
3. The location to which it leads is determined by the direction from which you entered the Depository.
4. If you enter from the east, you will be transported to the East Viewing Room; if you enter from the west, to the West Viewing Room. If you enter from the south (e.g., the Chairman's Office) you will be transported to the Small Room.
5. You can leave the Small Room by walking through the south wall (thus entering the Depository from the North).
6. If you enter the Depository from the north, you will be transported to the Vault.