Add:station 2 OK
Add:queue OK
Add:station 1 OK
Add:queue OK
Top:queue 2
Remove:queue OK
Remove:station OK
Queue 1
Size:queue 1
Train 2
Remove:queue OK
Remove:station OK
Queue
Size:queue 0
Train 2 1
Add:station 4 OK
Add:queue OK
Add:station 3 OK
Add:queue OK
Top:queue 4
Remove:queue OK
Remove:station OK
Queue 3
Size:queue 1
Train 2 1 4
Remove:queue OK
Remove:station OK
Add:queue Turntable empty!
Queue
Size:queue 0
Train 2 1 4 3