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

#define all(v) (v).begin(),(v).end()
#define pb emplace_back
#define rep(i, n) for(int i=0;i<(n);i++)
#define foa(e, v) for(auto& e : v)
#define dout(a) cout<<fixed<<setprecision(10)<<a
#define Cout(a) cout<<a<<'\n';

using ll = long long;
using ld = long double;
using Int = __int128;
template <class T> using pqr = priority_queue<T, vector<T>, greater<T>>;

template <typename T1, typename T2> inline bool chmax(T1 &a, T2 b) {
    bool compare = a < b;
    if(compare) a = b;
    return compare;
}
template <typename T1, typename T2> inline bool chmin(T1 &a, T2 b) {
    bool compare = a > b;
    if(compare) a = b;
    return compare;
}
template <typename T> inline T back(std::set<T> &s) {
    return *s.rbegin();
}
template <typename T> inline T back(std::multiset<T> &s) {
    return *s.rbegin();
}
template <typename T> inline T pop_back(std::set<T> &s) {
    auto it = prev(s.end());
    T val = *it;
    s.erase(it); 
    return val;
}
template <typename T> inline T pop_back(std::multiset<T> &s) {
    auto it = prev(s.end());
    T val = *it;
    s.erase(it); 
    return val;
}

const int dy[8] = {-1, 0, 0, 1, 1, -1, 1, -1};
const int dx[8] = {0, -1, 1, 0, -1, -1, 1, 1};

const ll MOD7 = 1000000007, MOD998 = 998244353, INF = (3LL << 59);
const int inf = 1 << 30;
const char br = '\n';

void solve() {
    vector<ll> v(6);
    rep(i, 6) {
        cin >> v[i];
        v[i] *= 4;
    }
    auto dis = [&](ll x1, ll y1, ll x2, ll y2) -> ll {
        return abs(x1 - x2) + abs(y1 - y2);
    };
    vector<pair<ll, ll>> ans;
    for(ll i = -1000; i <= 2000; i ++) {
        for(ll j = -1000; j <= 2000; j ++) {
            if(dis(i, j, v[0], v[1]) == dis(i, j, v[2], v[3]) and dis(i, j, v[2], v[3]) == dis(i, j, v[4], v[5])) {
                ans.pb(i, j);
                if((int)ans.size() >= 2) {
                    cout << -1 << endl;
                    return;
                }
            }
        }
    }
    cout << ans.size() << endl;
    ld inv = ld(1) / ld(4);
    for(auto [x, y] : ans) {
        dout(inv * ld(x));
        cout << " ";
        dout(inv * ld(y));
        cout << endl;
    }

}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int testcase = 1; 
    // cin >> testcase;
    while(testcase --) solve();

    return 0;
}