Working with and editing wordlist in RM

Hello people,

I have wordlist generated and stored after text processing. Wordlist contains N-grams as well as single words. I'm using this wordlist as WOR input in my next text processing operator, but I only need to keep N-Grams (contain _). There is Wordlist to Data operator that I can use to filter it, but there is no reverse Data to Wordlist Operator. Any other ways for me to filter the worldist?