How can i mark all photos that are NOT selected between my picks?

Let's say I have 100 photos in the develop mode already imported and some of them are favorite picks (P).

I hate touching my mouse while doing this, I would like to go to one of the picks, select it with my mouse with one click,  and then select all the rest coming after it until the next pick, with my keyboard only.

I will explain it in few steps so it will be clear.

- pick 10 photos (P).

- go and stand on one of them.

- mark the selected photo and then all the rest coming after it until the next pick.

- now jump again to the next pick etc.

- do all that just with my keyboard.

Is it possible to do such thing? With the keyboard of curse.

Please let me know if there is an easy option here.

Thanks a lot.