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#ifndef LOCAL
#pragma GCC optimize ("O3")
#endif

#include <bits/stdc++.h>

using namespace std;

#define sim template < class c
#define ris return * this
#define dor > debug & operator <<
#define eni(x) sim > typename \
enable_if<sizeof dud<c>(0) x 1, debug&>::type operator<<(c i) {
sim > struct rge { c b, e; };
sim > rge<c> range(c i, c j) { return {i, j}; }
sim > auto dud(c* x) -> decltype(cerr << *x, 0);
sim > char dud(...);
struct debug {
#ifdef LOCAL
~debug() { cerr << endl; }
eni(!=) cerr << boolalpha << i; ris; }
eni(==) ris << range(begin(i), end(i)); }
sim, class b dor(pair < b, c > d) {
  ris << "(" << d.first << ", " << d.second << ")";
}
sim dor(rge<c> d) {
  *this << "[";
  for (c it = d.b; it != d.e; ++it)
    *this << ", " + 2 * (it == d.b) << *it;
  ris << "]";
}
#else
sim dor(const c&) { ris; }
#endif
};
#define imie(x...) " [" #x ": " << (x) << "] "

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
template <typename A, typename B>
using unordered_map2 = __gnu_pbds::gp_hash_table<A, B>;
using namespace __gnu_pbds;
template <typename T> using ordered_set =
  __gnu_pbds::tree<T, __gnu_pbds::null_type, less<T>, __gnu_pbds::rb_tree_tag,
                   __gnu_pbds::tree_order_statistics_node_update>;
// ordered_set<int> s; s.insert(1); s.insert(2);
// s.order_of_key(1);    // Out: 0.
// *s.find_by_order(1);  // Out: 2.

using ld = long double;
using ll = long long;

constexpr int mod = 1000 * 1000 * 1000 + 7;
constexpr int odw2 = (mod + 1) / 2;

void OdejmijOd(int& a, int b) { a -= b; if (a < 0) a += mod; }
int Odejmij(int a, int b) { OdejmijOd(a, b); return a; }
void DodajDo(int& a, int b) { a += b; if (a >= mod) a -= mod; }
int Dodaj(int a, int b) { DodajDo(a, b); return a; }
int Mnoz(int a, int b) { return (ll) a * b % mod; }
void MnozDo(int& a, int b) { a = Mnoz(a, b); }
int Pot(int a, ll b) { int res = 1; while (b) { if (b % 2 == 1) MnozDo(res, a); a = Mnoz(a, a); b /= 2; } return res; }
int Odw(int a) { return Pot(a, mod - 2); }
void PodzielDo(int& a, int b) { MnozDo(a, Odw(b)); }
int Podziel(int a, int b) { return Mnoz(a, Odw(b)); }
int Moduluj(ll x) { x %= mod; if (x < 0) x += mod; return x; }

template <typename T> T Maxi(T& a, T b) { return a = max(a, b); }
template <typename T> T Mini(T& a, T b) { return a = min(a, b); }

class Liczba {
 public:
  bool operator==(const Liczba& a) const {
    return cyfry_ == a.cyfry_;
  }

  bool operator!=(const Liczba& a) const {
    return cyfry_ != a.cyfry_;
  }

  void Read() {
    int n;
    cin >> n;
    cyfry_.resize(n);
    for (int& c : cyfry_) {
      cin >> c;
    }
  }

  void Write() const {
    cout << cyfry_.size();
    for (int c : cyfry_) {
      cout << " " << c;
    }
    cout << "\n";
  }

  Liczba& operator+=(const Liczba& l) {
    vector<int>& sum = cyfry_;
    if (l.cyfry_.size() > sum.size()) {
      sum.resize(l.cyfry_.size());
    }
    for (int i = 0; i < (int) l.cyfry_.size(); i++) {
      sum[i] += l.cyfry_[i];
    }

    auto EliminacjaJedynek = [&sum]() -> void {
      debug() << "EliminacjaJedynek(" imie(sum) ")";
      for (int i = 0; i < (int) sum.size(); i++) {
        if (sum[i] == 0) {
        } else if (sum[i] == 1) {
          bool dwojka = false;
          int cnt = 0;
          for (int j = i; j < (int) sum.size(); j++) {
            if (sum[j] == 0) break;
            if (sum[j] == 2) {
              assert(cnt == 1 or cnt == 2);
              dwojka = true;
              break;
            }
            assert(sum[j] == 1);
            cnt++;
          }
          if (dwojka) {
            continue;
          }
          if (cnt % 2 == 1) {
            cnt--;
            i++;
          }
          assert(cnt % 2 == 0);
          if (i + cnt + 1 >= (int) sum.size()) {
            sum.resize(i + cnt + 2);
          }
          sum[i++] = 0;
          for (int j = 0; j < cnt; j += 2) {
            sum[i++] = 0;
            sum[i++] = 1;
          }
          i -= 2;
        } else if (sum[i] == 2) {
          if (i + 1 == (int) sum.size()) {
            sum.push_back(0);
          }
          assert(sum[i + 1] == 0);
          if (i > 0 and sum[i - 1] == 1) {
            sum[i - 1] = 0;
            sum[i] = 1;
            sum[i + 1] = 1;
            i--;
          }
        } else {
          assert(false);
        }
      }
    };

    auto EliminacjaDwojek = [&sum]() -> void {
      if (sum.size() < 2) {
        sum.resize(2);
      }
      debug() << "EliminacjaDwojek(" imie(sum) ")";
      for (int i = (int) sum.size() - 1; i >= 2; i--) {
        if (sum[i] != 2) continue;
        assert(sum[i - 1] == 0);
        if (sum[i - 2] == 0 or sum[i - 2] == 1) {
          sum[i]--;
          sum[i - 1]++;
          sum[i - 2]++;
        }
      }
      if (sum[1] == 2) {
        assert(sum[0] == 0);
        sum[1] = 1;
        sum[0] = 2;
      }
      if (sum[0] == 2) {
        int cnt = 0;
        for (int j = 1; j < (int) sum.size(); j++) {
          if (sum[j] == 0) break;
          assert(sum[j] == 1);
          cnt++;
        }
        if (cnt + 1 >= (int) sum.size()) {
          sum.resize(cnt + 2);
        }
        int pos = 0;
        if (cnt % 2 == 1) {
          sum[pos++] = 1;
          cnt--;
        }
        assert(cnt % 2 == 0);
        for (int i = 0; i <= cnt; i += 2) {
          sum[pos++] = 0;
          sum[pos++] = 1;
        }
      }
    };

    auto EliminacjaDwojek2 = [&sum]() -> void {
      for (int i = 0; i < (int) sum.size(); i++) {
        if (sum[i] == 2) {
          assert(i > 0);
          if (sum[i - 1] == 0) {
            assert(i >= 3);
            assert(sum[i - 2] == 1);
            assert(sum[i - 3] == 1);
            sum[i - 3] = 0;
            sum[i - 2] = 0;
            sum[i - 1] = 1;
          }
          assert(sum[i - 1] == 1);
          if (i + 1 == (int) sum.size()) {
            sum.push_back(0);
          }
          sum[i + 1]++;
          sum[i]--;
          sum[i - 1]--;
        }
      }
    };

    EliminacjaJedynek();
    EliminacjaDwojek();
    EliminacjaDwojek2();
    EliminacjaJedynek();

    while (!cyfry_.empty() and cyfry_.back() == 0) {
      cyfry_.pop_back();
    }

    return *this;
  }

  Liczba operator*(const Liczba& y) const {
    Liczba a1 = y;
    Liczba a2 = y;
    Liczba sum;
    for (int i = 0; i < (int) cyfry_.size(); i++) {
      if (cyfry_[i]) {
        sum += a2;
      }
      Liczba a0 = a1;
      a1 = a2;
      a0 += a1;
      a2 = a0;
    }
    return sum;
  }

  void Sprawdz() const {
    debug() << imie(cyfry_);
    for (int i = 0; i < (int) cyfry_.size(); i++) {
      assert(0 <= cyfry_[i] and cyfry_[i] <= 1);
      if (i > 0) {
        assert(cyfry_[i - 1] * cyfry_[i] != 1);
      }
    }
    assert(cyfry_.empty() or cyfry_.back() == 1);
  }

  int JestemJedynka() const {
    int gdzie = -1;
    int cnt = 0;
    for (int i = 0; i < (int) cyfry_.size(); i++) {
      if (cyfry_[i] == 1) {
        gdzie = i;
        cnt++;
      }
    }
    if (cnt != 1) {
      return -1;
    }
    assert(gdzie >= 0);
    return gdzie + 1;
  }

  static Liczba Jedynka(int n) {
    Liczba result;
    result.cyfry_.resize(n);
    result.cyfry_.back() = 1;
    return result;
  }

  static Liczba Syfek(int a, int b) {
    if (a < b) swap(a, b);
    Liczba result;
    result.cyfry_.resize(a + b - 1);
    const int ile = b / 2 + 1;
    auto Pos = [](int x) -> int {
      return max(x, 0);
    };
    for (int i = 0; i < ile; i++) {
      result.cyfry_[Pos(a + b - 2 - i * 4)] = 1;
    }
    if (b % 2 == 0) {
      result.cyfry_[Pos(a + b - 2 - (ile - 1) * 4)] = 0;
      result.cyfry_[Pos(a + b - 2 - (ile - 1) * 4 + 1)] = 1;
    }
    return result;
  }

 private:
  vector<int> cyfry_;
};

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t;
  cin >> t;
  while (t--) {
    Liczba a, b;
    a.Read();
    b.Read();
    const int ja = a.JestemJedynka();
    const int jb = b.JestemJedynka();
    if (ja != -1 and jb != -1) {
      Liczba c = Liczba::Syfek(ja, jb);
      c.Sprawdz();
      c.Write();
    } else {
      Liczba c = a * b;
      c.Sprawdz();
      c.Write();
    }
  }
  return 0;
}