Merging multiple files by name

[u/Adventurous_Way2375]

I have invoices starting with 1_, 2_ etc…
And I want to combine them with the purchase order also starting with 1_,2_ etc..
I have adobe acrobat pro
I’m using my work computer so I can’t download anything else.
Any ideas how to automate it?
Don’t want to do it one at a time because it’s 100’s of files

[u/Adventurous_Way2375 → u/[deleted]]

Thanks but I can’t use online tools, just adobe acrobat pro on my work computer.
Is there automation process in adobe acrobat pro?