What filename do you want to read? test2.txt
Read: add 50
Adding took 0 steps.
List is now [50] size=1 [50] size=1

Read: remove 50
Removing took 0 steps.
List is now [] size=0

Read: add 30
Adding took 0 steps.
List is now [30] size=1 [30] size=1

Read: add 80
Adding took 0 steps.
List is now [30 80] size=2 [80 30] size=2

Read: remove 80
Removing took 0 steps.
List is now [30] size=1 [30] size=1

Read: remove 30
Removing took 0 steps.
List is now [] size=0

Read: add 40
Adding took 0 steps.
List is now [40] size=1 [40] size=1

Read: add 60
Adding took 0 steps.
List is now [40 60] size=2 [60 40] size=2

Read: add 10
Adding took 0 steps.
List is now [10 40 60] size=3 [60 40 10] size=3

Read: add 55
Adding took 1 steps.
List is now [10 40 55 60] size=4 [60 55 40 10] size=4

Read: add 1000
Adding took 0 steps.
List is now [10 40 55 60 1000] size=5 [1000 60 55 40 10] size=5

Read: add 400
Adding took 4 steps.
List is now [10 40 55 60 400 1000] size=6 [1000 400 60 55 40 10] size=6

Read: remove 55
Removing took 2 steps.
List is now [10 40 60 400 1000] size=5 [1000 400 60 40 10] size=5

Read: remove 400
Removing took 3 steps.
List is now [10 40 60 1000] size=4 [1000 60 40 10] size=4