Python Leetcode

class Solution:
    def uniqueMorseRepresentations(self, words: List[str]) -> int:
        MORSE = [".-","-...","-.-.","-..",".","..-.","--.","....","..",".---","-.-",".-..","--","-.","---",".--.","--.-",".-.","...","-","..-","...-",".--","-..-","-.--","--.."]

        seen = set()

        for word in words:
            tmp = ''
            for w in word:
                tmp += MORSE[ord(w)-ord("a")]
            seen.add(tmp)

        # seen = {"".join(MORSE[ord(c) - ord('a')] for c in word) for word in words}
        
        return len(seen)