/*
Telebe of Adicto && Mamedov yani AzeTurk810
I see humans but no humanity
*/
#include <algorithm>
#include <cassert>
#include <functional>
#include <iostream>
#include <map>
#include <set>
#include <utility>
#include <vector>
// mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using ll = long long;
using namespace std;
#define ln '\n'
#define INFi 1e9
#define INFll 1e18
#define int ll
// #undef ONPC
#ifdef ONPC
#include <algo.hpp>
#else
#define dbg(...)
#define dbg_out(...)
#endif
char solve() {
int N, K;
if (!(cin >> N >> K))
return 1;
int M = N + K;
vector<int> A(M);
for (int i = 0; i < M; i++)
cin >> A[i];
sort(A.begin(), A.end());
vector<int> sums;
for (int i = 0; i <= min(M - 1, K * 3); i++) {
for (int j = M - 1; j >= max(0LL, M - K * 3 - 2); --j) {
sums.push_back(A[i] + A[j]);
}
}
sort(sums.begin(), sums.end());
{
vector<int> nsum;
map<int, int> cnt;
for (int i = 0; i < sums.size(); i++) {
cnt[sums[i]]++;
}
vector<pair<int, int>> temp;
for (auto [sum, cnt] : cnt) {
temp.emplace_back(cnt, sum);
}
sort(temp.begin(), temp.end(), greater<>());
for (int i = 0; i < min<ll>(temp.size(), 100); i++) {
nsum.push_back(temp[i].second);
}
nsum.swap(sums);
}
// sums.erase(unique(sums.begin(), sums.end()), sums.end());
for (int sum : sums) {
dbg(sum);
multiset<int> mst, res;
for (int i = 0; i < M; i++) {
int tar = sum - A[i];
auto it = mst.find(tar);
if (it != mst.end()) {
res.insert(tar);
res.insert(A[i]);
mst.erase(it);
} else {
mst.insert(A[i]);
}
}
if (res.size() >= N) {
dbg(res);
mst.swap(res);
vector<int> ans;
for (int i : mst) {
ans.push_back(i);
}
int i = 0, j = ans.size() - 1;
vector<int> res;
while (i < j) {
res.push_back(ans[i++]);
res.push_back(ans[j--]);
}
sort(res.begin(), res.end());
for (int i = 0; i < N; i++) {
cout << res[i] << ' ';
}
cout << ln;
return 0;
}
}
assert(0);
return 0;
}
// Attack on titan<3
signed main() {
ios::sync_with_stdio(0);
cin.tie(nullptr);
int t = 1e9;
// cin >> t;
for (int cases = 0; cases < t; cases++) {
if (solve())
break;
#ifdef ONPC
cerr << "__________\n";
#endif
}
}
// Just Imaginary
/*
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣀⣀⠀⠀⠀⢀⣴⣾⠀⠀⠀⡀⢀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⣿⣿⣿⣦⣾⣿⣿⣿⣿⣿⡆⠁⠀⢀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠹⣿⣿⣿⣿⣿⣿⣿⣿⡿⠁⠀⡠⠂⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⠠⠔⠚⣿⣿⣿⣿⣿⣦⡄⠀⠁⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⢀⠠⠐⢂⠉⡀⣀⣤⣄⢻⣿⣿⡟⢈⡹⣿⡀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⡀⠄⠂⠈⠀⣶⣤⣾⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⠘⣷⡀⠀⡀⠐⠂⠐⢄
⠀⠀⠀⠀⠀⠀⠀⣿⣿⠟⠿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⣀⣾⣷⠯⠀⠤⠤⠄⠈
⠀⠀⠀⠀⠀⠀⣼⣿⡟⠀⠀⣹⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣷⣄⡀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⣰⣿⠋⠀⠀⢠⣾⣿⣿⣿⣿⣿⣭⠟⢻⣿⣿⣿⣿⡿⠁⠀⠀⠀⠀
⠀⠀⠀⣀⣶⡟⠁⠀⢾⣶⣿⠟⠉⠈⢻⣿⣿⣿⣦⣜⠀⠛⠛⠿⠁⠀⠀⠀⠀⠀
⠚⠻⠿⠿⡿⠁⠀⢠⣿⣿⠁⠀⣠⠖⠋⠉⠻⣿⣿⣿⣶⡀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⠀⠀⣰⣿⡿⠃⠠⠊⠁⠀⠀⠀⠀⠈⢿⣿⣿⠟⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⠀⢀⣴⡿⠋⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠀⠀⠀⣠⣾⠏⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⢀⣴⠾⠟⠛⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
*/
