#if __INCLUDE_LEVEL__ == 0

#include __BASE_FILE__

void Solve() {
  int n;
  IN(n);
  vector<int> R(n), C(n);
  IN(R, C);

  vector ans(n, vector<int>(n));
  for (int i : Rep(0, n))
    ranges::fill(ans[i], R[i]);

  vector<int> from(n);
  for (int j : Rep(0, n))
    from[j] = int(ranges::find(R, C[j]) - R.begin());

  vector<int> to;
  to.reserve(n);
  vector cnt(n, vector<int>(n));
  for (int i : Rep(0, n))
    cnt[i][i] = n;
  bool res = Fix([&](auto self) -> bool {
    if (Len(to) == n)
      return true;

    int j = Len(to);
    for (int x : Rep(0, n)) {
      if (x == from[j])
        continue;

      {
        --cnt[x][x];
        ++cnt[x][from[j]];
        int tmp = cnt[x][x];
        cnt[x][x] = 0;
        bool ok = ranges::max(cnt[x]) < tmp;
        cnt[x][x] = tmp;
        if (!ok) {
          --cnt[x][from[j]];
          ++cnt[x][x];
          continue;
        }
      }

      to.push_back(x);
      if (self())
        return true;
      to.pop_back();

      --cnt[x][from[j]];
      ++cnt[x][x];
    }

    return false;
  })();

  if (res) {
    for (int j : Rep(0, n))
      ans[to[j]][j] = ans[from[j]][j];
    ranges::for_each(ans, LIFT(OUT));
  } else {
    OUT(-1);
  }
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  int t;
  IN(t);
  while (t--) {
    Solve();
  }
}

#elif __INCLUDE_LEVEL__ == 1

#include <bits/stdc++.h>

template <class F>
class Fix {
 public:
  explicit Fix(F f) : f_(std::move(f)) {}

  template <class... Ts>
  decltype(auto) operator()(Ts&&... xs) {
    return f_(std::ref(*this), std::forward<Ts>(xs)...);
  }

  template <class... Ts>
  decltype(auto) operator()(Ts&&... xs) const {
    return f_(std::ref(*this), std::forward<Ts>(xs)...);
  }

 private:
  F f_;
};

template <class T>
concept MyRange =
    std::ranges::range<T> &&
    !std::convertible_to<T, std::string_view> &&
    !std::convertible_to<T, std::filesystem::path>;

template <class T>
concept MyTuple = std::__is_tuple_like<T>::value && !MyRange<T>;

namespace std {

istream& operator>>(istream& is, MyRange auto&& r) {
  for (auto&& e : r) {
    is >> e;
  }
  return is;
}

istream& operator>>(istream& is, MyTuple auto&& t) {
  apply([&](auto&... xs) { (is >> ... >> xs); }, t);
  return is;
}

ostream& operator<<(ostream& os, MyRange auto&& r) {
  auto sep = "";
  for (auto&& e : r) {
    os << exchange(sep, " ") << forward<decltype(e)>(e);
  }
  return os;
}

ostream& operator<<(ostream& os, MyTuple auto&& t) {
  auto sep = "";
  apply([&](auto&... xs) { ((os << exchange(sep, " ") << xs), ...); }, t);
  return os;
}

}  // namespace std

template <class T>
class OneBased {
 public:
  explicit OneBased(T&& x) : ref_(std::forward<T>(x)) {}

  template <class... Ts>
  requires(sizeof...(Ts) > 1)
      OneBased(Ts&&... xs) : ref_(std::forward_as_tuple(std::forward<Ts>(xs)...)) {}

  friend std::istream& operator>>(std::istream& is, OneBased x) {
    if constexpr (MyRange<T>) {
      for (auto&& e : x.ref_) {
        is >> ::OneBased(e);
      }
    } else if constexpr (MyTuple<T>) {
      std::apply([&](auto&... xs) { (is >> ... >> ::OneBased(xs)); }, x.ref_);
    } else {
      is >> x.ref_;
      --x.ref_;
    }
    return is;
  }

  friend std::ostream& operator<<(std::ostream& os, OneBased x) {
    if constexpr (MyRange<T>) {
      auto f = [](auto&& e) { return ::OneBased(std::forward<decltype(e)>(e)); };
      os << (x.ref_ | std::views::transform(f));
    } else if constexpr (MyTuple<T>) {
      std::apply([&](auto&... xs) { os << std::tuple(::OneBased(xs)...); }, x.ref_);
    } else {
      os << ++x.ref_;
      --x.ref_;
    }
    return os;
  }

 private:
  T ref_;
};

template <class T>
OneBased(T&&) -> OneBased<T>;

template <class... Ts>
OneBased(Ts&&...) -> OneBased<std::tuple<Ts...>>;

using namespace std;

#define LIFT(f) ([&](auto&&... xs) -> decltype(auto) { return f(forward<decltype(xs)>(xs)...); })
#define Rep(...) [](int l, int r) { return views::iota(min(l, r), r); }(__VA_ARGS__)
#define Len(r) int(size(r))
#define IN(...) (cin >> forward_as_tuple(__VA_ARGS__))
#define OUT(...) (cout << forward_as_tuple(__VA_ARGS__) << '\n')

#endif  // __INCLUDE_LEVEL__ == 1