#include <bits/stdc++.h>

using namespace std;

//templates

// ---------- 基本 ----------
#define ll long long
#define ull unsigned long long
#define ld long double

#define pii pair<int,int>
#define pll pair<ll,ll>
#define pl pair<ll,ll>
#define vecll vector<ll>
#define vecpll vector<pll>
#define vecs vector<string>
#define cinvec(vec,type,size) vector<type> vec(size); for(ll i=0;i<size;i++) cin >> vec[i];

using i128 = __int128;

// ---------- for 系 ----------
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define rep1(i,n) for(ll i=1;i<=(ll)(n);i++)
#define rrep(i,n) for(ll i=(ll)(n)-1;i>=0;i--)
#define repi(i,a,b) for(ll i=(ll)(a);i<(ll)(b);i++)

// ---------- コンテナ操作 ----------
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

// ---------- sort ----------
#define srt(x) sort(all(x))
#define rsrt(x) sort(rall(x))

// ---------- vector ----------
#define sumall(x) std::reduce(all(x))
#define maxall(x) *max_element(all(x))
#define minall(x) *min_element(all(x))

// ---------- 出力補助 ----------
#define yes cout << "Yes\n"
#define no cout << "No\n"
#define YES cout << "YES\n"
#define NO cout << "NO\n"
#define print(a) cout << (a) << "\n"

// その他
#define append push_back

//デバッグ用
#define dbg cout << "DEBUG" << endl


using pquell = priority_queue<ll>;

#define INFLL 1LL<<62

int main(){
    ll T;
    cin >> T;
    rep(h,T){
        ll N;
        cin >> N;
        vector<ll> R(N),C(N);
        rep(i,N){
            cin >> R[i];
        }
        rep(i,N){
            cin >> C[i];
        }
        vector<vector<ll>> ans(N,vector<ll>(N));
        for(int i = 0;i<N/2;i++){
            for(int j = 0;j<N/2;j++){
                ans[i][j] = R[i];
            }
        }
        for(int i = N/2;i<N;i++){
            for(int j = N/2;j<N;j++){
                ans[i][j] = R[i];
            }
        }

        for(int i = 0;i<N/2;i++){
            for(int j = N/2;j<N;j++){
                ans[i][j] = C[j];
            }
        }
        for(int i = N/2;i<N;i++){
            for(int j = 0;j<N/2;j++){
                ans[i][j] = C[j];
            }
        }
        rep(i,N){
            rep(j,N){
                cout << ans[i][j] << " ";
            }
            cout << endl;
        }

    }
}