Leetcode 648. Replace Words

class Solution:
    def replaceWords(self, dictionary: List[str], sentence: str) -> str:
        dictionary = {item: item for item in dictionary}
        words = sentence.split(' ')
        result = []
        for word in words:
            for i in range(1, len(word) + 1):
                if word[:i] in dictionary:
                    word = word[:i]
                    break
            result.append(word)
        return ' '.join(result)