#include<iostream>
#include<bits/stdc++.h>

using namespace std;

map<string, int> tagok;
string a;

int main(){
    int N;
    cin >> N;
    for(int i = 0; i < N; i++)
    {
        cin >> a;
        sort(a.begin(), a.end());
        tagok[a]++;
    }

    for (pair<string, int> v:tagok)
    {
        if(v.second%2==1) cout << v.first << "\n";
    }
}