Keyboard Maestro Error on accented characters

Thanks yet again. You have been so helpful. I'm learning a lot about macro building. I idea of accumulating text to a variable is easy for me to grasp. What is a bit of a challenge is the actual implementation? Where in the loop it should occur? And what are some of the KM tricks that can be used? You mentioned a null "Output" variable and a variable called "Return". Both new to me.

I see how this should and could work. I want to cogitate with this a little.

I read ComplexPoint's article and I'm not sure it helps or confuses me.

Suggested option for the excellent For Each action – Map