Group Anagrams

Given an array of strings strs, group all anagrams together into sublists. You may return the output in any order.

from collections import defaultdict

class Solution:
	def groupAnagrams(self, strs: List[str]) -> List[List[str]]:
		res = defaultdict(list)
		for s in strs:
			chars = [0] * 26
			for char in s:
				chars[ord(char) - ord('a')] += 1
			res[tuple(chars)].append(s)
		return list(res.values())