Algoverse_adesh_9

class Solution:
    def commonChars(self, words: List[str]) -> List[str]:
        a = min(words)
        words.remove(a)
        for char in a[:]: # shallow copy by slice
            for i, word in enumerate(words):
                if char not in word and (i == len(words) or char in a):
                    a =a.replace(char, "", 1)
                    break
                else:
                    words[i] = words[i].replace(char, "", 1)
        return a