Welcome to the Make community!
You can simply type a single space between both variables, or select the special space variable from the variables panel (which can also be typed like this: {{space}}
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Did you know, the concepts of about 70% of questions asked on this forum are already covered in the Make Academy. Investing some effort into it will save you lots of time and frustration using Make later!