Unselected items from list

I am writing a short cut that provides me with a list of tasks I said I would do yesterday. I select the ones I did not do and then I want it to give me a list of the ones I did not select so I can choose to do them today or not if they are no longer important.

Any ideas on how I go about getting the unselected items?

Thanks

Chris

Here is a simple example of one method that takes advantage of Toolbox Pro.

https://www.icloud.com/shortcuts/f5b9366b809f42e8a51b9b8796c8a36d