Phyton Script - How to use it on Dynamo

This should do it:

stringlist = IN[0]
import itertools

def generate_groups(lst, n):
    if not lst:
        yield []
    else:
        for group in (((lst[0],) + xs) for xs in itertools.combinations(lst[1:], n-1)):
            for groups in generate_groups([x for x in lst if x not in group], n):
                yield [group] + groups


OUT = generate_groups(stringlist, 2)
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