#include <bits/stdc++.h> using namespace std; #include <ext/pb_ds/assoc_container.hpp> using namespace __gnu_pbds; gp_hash_table<int, int>cnt; inline void solve() { int n,k; cin>>n>>k; int a[n+k]; map<int,int>pre; for (auto& i:a) { cin>>i; pre[i]=1; } for (int i=0;i<n+k;i++) { int l=n+k,r=0; for (int j=0;j<=min(i,k);j++) { int ind=i+1-j; if (ind>n/2) continue; int ex=(n-ind+1)-ind; l=min(l,i+ex); r=max(r,i+ex+k-j); } r=min(r,n+k-1); for (int j=l;j<=r;j++) cnt[a[i]+a[j]]++; } for (auto [i,j]:cnt) { if (j>=n/2) { vector<int>ans; for (int l=0;l<n+k&&ans.size()<n;l++) { if (pre.find(i-a[l])==pre.end()) continue; ans.push_back(i-a[l]); ans.push_back(a[l]); } sort(begin(ans),end(ans)); for (auto i:ans) cout<<i<<' '; cout<<endl; return; } } } int main() { ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL); int t=1; for (int i=1;i<=t;i++) { solve(); } }