Add:station 1
Add:queue
Add:station 2
Add:queue
Add:station 3
Add:queue
Add:station 4
Add:queue
Add:station 5
Add:queue
Add:station 6
Add:queue
Add:station 7
Add:queue
Add:station 8
Add:queue
Add:station 9
Add:queue
Size:queue
Queue

Add:station 10
Add:stack
Add:station 11
Add:stack
Add:station 12
Add:stack
Add:station 13
Add:stack
Add:station 14
Add:stack
Add:station 15
Add:stack
Add:station 16
Add:stack
Add:station 17
Add:stack
Add:station 18
Add:stack
Size:stack
Stack

Remove:queue
Remove:station
Remove:queue
Remove:station
Remove:queue
Remove:station
Remove:queue
Remove:station
Remove:queue
Remove:station
Remove:queue
Remove:station
Remove:queue
Remove:station
Remove:queue
Remove:station
Remove:queue
Remove:station
Remove:queue
Size:train
Train

Remove:stack
Remove:station
Remove:stack
Remove:station
Remove:stack
Remove:station
Remove:stack
Remove:station
Remove:stack
Remove:station
Remove:stack
Remove:station
Remove:stack
Remove:station
Remove:stack
Remove:station
Remove:stack
Remove:station
Remove:stack
Size:stack
Stack
Size:queue
Queue
Size:train
Train