You could do the whole thing (parsing, splitting, outputting one row with multiple columns per @ group) using an asynchronous Script Component, but it would take a fair chunk of C# to implement.
If that doesn't scare you, do some research to get yourself up to speed with what this might entail & then come back here with any follow-up questions.
If you haven't even tried to resolve your issue, please don't expect the hard-working volunteers here to waste their time providing links to answers which you could easily have found yourself.