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import collections

from typing import List

class Solution:

def groupAnagrams(self, strs: List[str]) -> List[List[str]]:

anagrams = collections.defaultdict(list)

for word in strs:

# 정렬하여 딕셔너리에 추가

anagrams[''.join(sorted(word))].append(word)

return list(anagrams.values())