#include <bits/stdc++.h>
using namespace std;
void main_program();
signed main(){
ios_base::sync_with_stdio(0); cin.tie(0);
main_program();
}
int n, k;
vector<int> v;
map<int, int> mp;
void main_program(){
cin >> n >> k;
v.resize(n + k); for (auto &i: v) cin >> i;
for (int i = 0; i < n; i++){
// X = (n-1) - j
// i-k <= X <= i+k
// i-k <= (n-1) - j <= i+k
// j <= (n-1) + k - i
// j >= (n-1) - k - i
for (int j = max(i+1, n-1 - k - i); j <= min(n-1, n-1 + k - i); j++){
// cout << ":: " << i << " " << j << "\n";
mp[v[i] + v[j]]++;
}
}
for (auto [key, value]: mp){
if (value < n/2) continue;
set<int> tmp;
for (auto i: v) tmp.insert(i);
vector<int> res;
for (auto i: tmp){
if (tmp.count(key - i)) res.push_back(i);
if ((int)res.size() >= n/2) break;
}
for (int i = 0; i < n/2; i++) cout << res[i] << " ";
for (int i = n/2 - 1; i >= 0; i--) cout << key - res[i] << " ";
cout << "\n";
return;
}
}
