Delete duplicate values from multiple string attributes

I have features with about 15 string attributes. Each of these attributes has to be split into a list in order to delete duplicate values. I have already used an AttributeSplitter followed by a ListDuplicateRemover. But since I have 15 attributes, I was wondering if there is a more effective way of doing this instead of having 15 AttributeSplitters and 15 ListDuplicateRemovers.

Thank you!