#include <bits/stdc++.h>
using namespace std;
int main() {
  int x[5], y[5];
  for (int i = 1; i < 4; i++) scanf("%d%d", &x[i], &y[i]);
  puts("3");
  int p = x[1] + x[2] + x[3];
  int q = y[1] + y[2] + y[3];
  for (int i = 1; i < 4; i++) {
    x[4] = p - x[i] * 2;
    y[4] = q - y[i] * 2;
    printf("%d %d\n", x[4], y[4]);
  }
  return 0;
}
