#include "hieroglyphs.h"
#include <bits/stdc++.h>
#define ll long long
#define endl "\n"
using namespace std;
std::vector<int> ucs(std::vector<int> a, std::vector<int> b)
{
set<ll> sa, sb;
for (ll i : a)
sa.insert(i);
for (ll i : b)
sb.insert(i);
{
vector<int> nv;
for (ll i : a)
if (sb.count(i))
nv.push_back(i);
a = nv;
nv.clear();
for (ll i : b)
if (sa.count(i))
nv.push_back(i);
b = nv;
}
vector<int> ans, ans1, ans2, ans3;
set<ll> s;
for (ll i : a)
if (!s.count(i))
ans.push_back(i), s.insert(i);
s.clear();
for (ll i : b)
if (!s.count(i))
ans1.push_back(i), s.insert(i);
s.clear();
for (ll i = (ll)a.size() - 1; i >= 0; i--) if (!s.count(a[i])) ans2.push_back(a[i]), s.insert(a[i]);
s.clear();
for (ll i = (ll)b.size() - 1; i >= 0; i--) if (!s.count(b[i])) ans3.push_back(b[i]), s.insert(b[i]);
if (ans == ans1 and ans2 == ans3) return ans;
return {-1};
}
