Room{
	var doors : [String : Door]
	var tag : String

func setExit(_ exitName : String, door : Door) {
        doors[exitName] = door
    }

    func getExit(_ exitName : String) -> Door? {
        return doors[exitName]
    }

}

Door{
	private var _roomA : Room
    private var _roomB : Room

func connect(firstRoom : Room, secondRoom: Room, firstLabel: String, secondLabel : String) -> Door {
    let door : Door = Door (roomA: firstRoom, roomB: secondRoom)
    firstRoom.setExit(secondLabel, door : door)
    secondRoom.setExit(firstLabel, door : door)
    return door
}
}

func createWorld(){
		let outside = Room(tag: "outside the main entrance of the university")
        let cctParking = Room(tag: "in the parking lot at CCT")

		var door : Door = connect(firstRoom: outside, secondRoom: boulevard, firstLabel: "east", secondLabel: "west")

        door = connect(firstRoom: boulevard, secondRoom: cctParking, firstLabel: "south", secondLabel: "north")

}