#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (int i = (a); i < (b); i++)
#define all(x) begin(x), end(x)
#define sz(x) int((x).size())
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

#ifdef LOCAL
auto operator<<(auto& o, auto x) -> decltype(x.first, o);
auto operator<<(auto& o, auto x) -> decltype(x.end(), o) {
  o << "{";
  for (int i = 0; auto y : x) o << ", " + !i++ * 2 << y;
  return o << "}";
}
auto operator<<(auto& o, auto x) -> decltype(x.first, o) {
  return o << "(" << x.first << ", " << x.second << ")";
}
void __print(auto... x) { ((cerr << x << " "), ...) << endl; }
#define debug(x...) __print("[" #x "]:", x)
#else
#define debug(...) 2137
#endif

bool inter(int x1, int y1, int x2, int y2) {
  int xx = max(x1, x2);
  int yy = min(y1, y2);
  return xx <= yy;
}

bool in(int n, int m, int x, int y) {
  return x >= 0 && x < n && y >= 0 && y < m;
}

int main() {
  cin.tie(0)->sync_with_stdio(0);
  vector<pii> w(4);
  int pole = 0;
  rep(i, 0, 4) {
    cin >> w[i].first >> w[i].second;
    pole += w[i].first * w[i].second;
  }
  for (int bok = 1; bok <= pole; bok++) {
    if (pole % bok == 0) {
      int n = bok;
      int m = pole / bok;
      auto w2 = w;
      rep(msk, 0, 1 << 4) {
        rep(i, 0, 4) if ((msk >> i) & 1) swap(w2[i].first, w2[i].second);
        sort(all(w2));
        do {
          vector<array<int, 4>> juz;
          vector<pii> p;
          p.push_back({0, 0});
          rep(i, 0, 4) {
            sort(all(p));
            for (auto [x, y] : p) {
              bool ok = 1;
              for (auto [x1, y1, h, w] : juz) {
                if (x1 <= x && x < x1 + h && y1 <= y && y < y1 + w) {
                  ok = 0;
                  break;
                }
              }
              if (x < 0 || x >= n || y < 0 || y >= m) ok = 0;
              auto [h, w] = w2[i];
              if (ok) {
                juz.push_back({x, y, h, w});
                p.push_back({x, y + w});
                p.push_back({x + h, y});
                break;
              }
            }
          }
          bool ok = 1;
          if (sz(juz) != 4) {
            continue;
          }
          rep(i, 0, 4) rep(j, i + 1, 4) {
            auto [x1, y1, h1, w1] = juz[i];
            auto [x2, y2, h2, w2] = juz[j];
            debug(x1, y1, h1, w1);
            debug(x2, y2, h2, w2);
            if (inter(x1, x1 + h1 - 1, x2, x2 + h2 - 1) && inter(y1, y1 + w1 - 1, y2, y2 + w2 - 1)) {
              ok = 0;
              break;
            }
          }
          for (auto [x, y, h, w] : juz) {
            if (!in(n, m, x, y) || !in(n, m, x + h - 1, y + w - 1)) {
              ok = 0;
              break;
            }
          }
          if (ok) {
            debug(n, m, juz);
            cout << 1 << '\n';
            return 0;
          }
        } while (next_permutation(all(w2)));
      }
    }
  }
  cout << "0\n";
}