Όλα τα φωνήεντα άπαξ

import unicodedata as ud
import re
import fileinput

re_vowels= re.compile('[αεηιουω]')

def unaccented_vowels(word):
    return re_vowels.findall(ud.normalize('NFD', word.lower()))

def all_vowels_once(word):
    l= unaccented_vowels(word)
    return len(l) == 7 and len(frozenset(l)) == 7

def main():
    for word in filter(all_vowels_once, fileinput.input()):
        print(word.rstrip())

if __name__ == "__main__":
    main()