#include <bits/stdc++.h>
using namespace std;
long long fib[10000];
long long fibo(long long n) {
  fib[0] = 0;
  fib[1] = 1;
  for (long long i = 2; i <= n; i++) {
    fib[i] = fib[i - 1] + fib[i - 2];
  }
  return fib[n];
}
signed main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  {
    long long t = 1;
    while (t--) {
      long long x1, x2, x3, y1, y2, y3;
      cin >> x1 >> y1 >> x2 >> y2 >> x3 >> y3;
      cout << 3 << '\n';
      cout << (x1 + x2 - x3) << " " << (y1 + y2 - y3) << '\n';
      cout << (x1 - x2 + x3) << " " << (y1 - y2 + y3) << '\n';
      cout << (-x1 + x2 + x3) << " " << (-y1 + y2 + y3) << '\n';
    }
  }
}
