def isInList (l, c) :
    for i in l :
        if i == c :
            return False
    return True

l = []
rez = []
while True :
    s = input("Unesite String: ")
    if s == "" :
        break
    l.append(s)

for i in l :
    temp = []
    for k in i :
        if k == 'a' :
            if isInList(temp, k) :
                temp.append(k)
        if k == 'e':
            if isInList(temp, k):
                temp.append(k)
        if k == 'i':
            if isInList(temp, k):
                temp.append(k)
        if k == 'o':
            if isInList(temp, k):
                temp.append(k)
        if k == 'u':
            if isInList(temp, k):
                temp.append(k)
    rez.append(temp)

print(rez)