One of the possible 54 doors which to be pulled from the Blind Mystery Deck.

Iron Pillar Door - Grey door with an extra metal bar door, for extra protection of a HDB flat.

One of the possible 54 doors which to be pulled from the Blind Mystery Deck.

Horizontal Sliding Iron Door - White sliding horizontal iron door of a modern shophouse.

One of the possible 54 doors which to be pulled from the Blind Mystery Deck.

Operating Room Door - Red door of an operating room of a hospital.

One of the possible 54 doors which to be pulled from the Blind Mystery Deck.

Traditional Chinese Wooden Door - Red double doors with golden door knockers of a house.