Regular expression for popover plugin

Hi, I see that the new release of pop over came out. thanks.

If I want the popup to go off on the following urls:

http://mysite.com/site1/store

http://mysite.com/site2/store

http://mysite.com/site3/store

etc

and all sites are a blog template of site1

what do I enter in this template site’s specific url?

https://wpmudev.com/forums/topic/feature-request-popover-plugin