--- Rail yard has 2 tracks ---
ADD_REAR Car[ID: 0, Type: Passenger] to Track 0
ADD_REAR Car[ID: 1, Type: Passenger] to Track 0
REMOVE_FRONT from Track 0 returned Car[ID: 0, Type: Passenger]
ADD_REAR Car[ID: 3, Type: Passenger] to Track 0
REMOVE_FRONT from Track 0 returned Car[ID: 1, Type: Passenger]
REMOVE_FRONT from Track 0 returned Car[ID: 3, Type: Passenger]
GET_FRONT from Track 0 returned <TRACK EMPTY>
ADD_REAR Car[ID: 7, Type: Passenger] to Track 1
ADD_REAR Car[ID: 8, Type: Passenger] to Track 1
ADD_FRONT Car[ID: 9, Type: Passenger]
ADD_FRONT Car[ID: 10, Type: Passenger]
REMOVE_REAR returned Car[ID: 8, Type: Passenger]
REMOVE_REAR returned Car[ID: 7, Type: Passenger]
REMOVE_REAR returned Car[ID: 9, Type: Passenger]
GET_REAR returned Car[ID: 10, Type: Passenger]
GET_FRONT from Track 1 returned Car[ID: 10, Type: Passenger]
REMOVE_FRONT from Track 1 returned Car[ID: 10, Type: Passenger]
REMOVE_REAR returned <TRACK EMPTY>