Javascript – How to add parentheses to an output through input?

Currently learning Javascript (very much a beginner) and I’m trying to figure out how to add parentheses to an output, more specifically to the pronouns.

Almost like

'(' + inputPronouns + ')' = (they/them)

I have a JS bin of the project, https://jsbin.com/guyahew/edit?html,js,output

What would be the best way to approach this?

Thanks!