#include <iostream>
#include "stack.h"

using namespace std;

stack *result(stack *&h)
{
    stack *tmp = NULL;
    stack *res = NULL;
    
    while (h)
    {
        int c;
        c = pop(h);
        if (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u')
            push(tmp, c);
        else
            push(res, c);
    }

    reverse(res);
    while (tmp)
    {
        int elem;
        elem = pop(tmp);
        push(res, elem);
    }

    return res;
}

int main()
{
    int n;
    cout << "n = ";
    cin >> n;
    stack *head = NULL;
    char x;
    for (int i = 0; i < n; i++)
    {
        cin >> x;
        push(head, int(x));
    }
    reverse(head);
    stack *res = result(head);
    while (res)
        cout << char(pop(res)) << " ";
    cout << endl;

    return 0;

}