题目：

题解：

class Solution:
    def findWords(self, words: List[str]) -> List[str]:
        ans = []
        rowIdx = "12210111011122000010020202"
        for word in words:
            idx = rowIdx[ord(word[0].lower()) - ord('a')]
            if all(rowIdx[ord(ch.lower()) - ord('a')] == idx for ch in word):
                ans.append(word)
        return ans