python判断输入单词是否包含所有元音字母

用python语言判断输入单词是否包含所有的元音字母

def claen(word):
            return word.strip().lower()
         
 def lookUpWord(word):
       newword = ""
       for char in word:
           if char in 'aeiou':
               newword += char
           return newword
           
if __name__ == '__main__':
    try:
       with open(r'dictionary.txt') as f:
           for word in f:
               word = claen(word)
               wordstr = lookUpWord(word)
               if wordstr == 'aeiou':
                  print(word)
     finally:
        f.close()