HTMLify

class Solution:
    def isLowerOrEqual(self, word1, word2, order) -> bool:
        for i in range(min(len(word1), len(word2))):
            lc, rc = word1[i], word2[i]
            if lc != rc:
                if order.find(lc) < order.find(rc):
                    return True
                else:
                    return False
        if len(word1) > len(word2):
            return False
        return True

    def isAlienSorted(self, words: List[str], order: str) -> bool:
        if len(words) == 1:
            return True
        for i in range(len(words)-1):
            if not self.isLowerOrEqual(words[i], words[i+1], order):
                return False
        return True