#include "bits/stdc++.h"
using namespace std;
#define int long long
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define ss second
#define ff first
#define pb push_back
void solve(){
int n, k; cin >> n >> k;
int N = n + k;
map<int, int> mp;
vector<int> v(N);
for(int i = 0; i < N; i++){
cin >> v[i];
mp[v[i]]++;
}
map<int, int> cnt;
int sm = 0;
for(int i = 0; i < N; i++){
for(int j = i + 1; j < N; j++){
int x = v[i] + v[j];
cnt[x]++;
if(cnt[x] == n / 2){
i = N;
sm = x; break;
}
}
}
vector<int> ans;
for(int i = 0; i < N; i++){
if(mp[v[i]] == 1 && mp[sm - v[i]] == 1){
ans.pb(v[i]);
ans.pb(sm - v[i]);
mp[v[i]]++;
mp[sm - v[i]]++;
}
}
sort(all(ans));
for(int &i : ans) cout << i << ' ';
}
signed main() {
cin.tie(nullptr)->sync_with_stdio(false);
int t = 1; //cin >> t;
while(t--){
solve();
cout << endl;
}
return 0;
}
