如果两个单词是换位词，他们包含同样个数的同样字母，所以他们的计数器是相等的。
If two words are anagrams, they contain the same letters with the same counts, so their Counters are equivalent.
如果两个单词是换位词，他们包含同样个数的同样字母，所以他们的计数器是相等的。
If two words are anagrams, they contain the same letters with the same counts, so their Counters are equivalent.
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