Please input the file pathname: e6.txt

> undo
Nothing to undo.

> list
Helena ($10000, 7 days)
LazyGuy ($15000, 7 days)

> redo
Nothing to redo.

> list
Helena ($10000, 7 days)
LazyGuy ($15000, 7 days)

> exchangeSalaries Helena LazyGuy
Done.

> addSalary Helena 5000
Done.

> fire LazyGuy
Done.

> list
Helena ($20000, 7 days)

> undo

> undo

> undo

> undo
Nothing to undo.

> list
Helena ($10000, 7 days)
LazyGuy ($15000, 7 days)

> redo

> redo

> redo

> redo
Nothing to redo.

> list
Helena ($20000, 7 days)

> undo

> undo

> changeAnnualLeaves Helena 365
Done.

> list
Helena ($15000, 365 days)
LazyGuy ($10000, 7 days)

> redo
Nothing to redo.

> list
Helena ($15000, 365 days)
LazyGuy ($10000, 7 days)