#!/usr/bin/python3
def find_vowels():
	text = input("Δώσε ένα αλφαριθμητικό: ").lower()
	english_vowels = {'a', 'e', 'i', 'o', 'u'}
	greek_vowels = {'α', 'ε', 'η', 'ι', 'ο', 'υ', 'ω'}

	found_vowels = []

	for char in text:
		if char in english_vowels or char in greek_vowels:
			if char not in found_vowels:
				found_vowels.append(char)
	return found_vowels
def main():
	vowels = find_vowels()
	print("Βρέθηκαν τα φωνήεντα:", vowels)
if __name__=="__main__":
	main()