Create a model of Bank with its clients and play with it in Main class.
You need to satisfy all TODO fields in code that can be placed in exceptions (to be removed)
or in some comments (also remove after implementing) - you can find all of them with Ctrl+Alt+L
shortcut in Intellij.
Probably it would be easier to start with BankAction, then work on BankClient and finally work on
Bank and short example in Main