#pragma ide diagnostic ignored "misc-no-recursion"

#include "bits/stdc++.h"

using namespace std;
typedef long long ll;
typedef double db;
#define x first
#define y second

#define TESTCASE 0

static constexpr int INF = 1e9;

static void solve([[maybe_unused]] int tc) {
    array<pair<int, int>, 3> P;
    for (auto &p: P) {
        cin >> p.x >> p.y;
    }

    sort(P.begin(), P.end());

    vector<array<int, 4>> res;
    res.push_back({
                          P[1].x, min({P[0].y, P[1].y, P[2].y}),
                          P[1].x, max({P[0].y, P[1].y, P[2].y})
                  });
    if (P[0].x != P[1].x) {
        res.push_back({P[0].x, P[0].y, P[1].x, P[0].y});
    }
    if (P[1].x != P[2].x) {
        res.push_back({P[2].x, P[2].y, P[1].x, P[2].y});
    }

    cout << res.size() << '\n';
    for (auto &r: res) {
        cout << r[0] << ' ' << r[1] << ' ' << r[2] << ' ' << r[3] << '\n';
    }
}

int main() {
    ios::sync_with_stdio(false);

    if (const char *f = getenv("REDIRECT_STDOUT"); f) {
        freopen(f, "w", stdout);
    }

    int T = 1;
#if TESTCASE
    cin >> T;
#endif

    for (int t = 1; t <= T; t++) {
        solve(t);
    }

    return 0;
}