In case it helps, I’ve broken out the code used in my demo up-thread, clarified it slightly and posted it in a separate thread to aid discussion without causing thread drift here.
I concur with @PaulWalters’ last. I hope @eastgate has enough to consider whether something is feasible in an action operator wrapper. As my demo code, doing un-ordered pairs is do-able (but it’s not beginner’s code). going to triple and beyond is likely not feasible, as action code, but might be if done directly in the app. I’ve assume an output as text but perhaps there might be a way to use existing (new?) views to also help visualise the result.