54F3

Let's check out 351(notepad says hammer, unchecked) as well. We already have a hammer, but it would be good to finish off the unchecked locations in the notepad.

I would rather finish off the notebook before picking random numbers.

That's a hammer alright.

Then, 789.

why was it afraid?

Another hammer!? Is this the setup of a convoluted puzzle or mere laziness on the omnipotent creator's part, only time will tell.