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

signed main(){
  vector< int > x( 3 ), y( 3 );
  for( int i = 0; i < 3; ++i )
    cin >> x[ i ] >> y[ i ];
  for( int i = 0; i < 3; ++i )
    for( int j = i + 1; j < 3; ++j ){
      int a2 = ( x[ i ] - x[ 3 - i - j ] ) * ( x[ i ] - x[ 3 - i - j ] ) + ( y[ i ] - y[ 3 - i - j ] ) * ( y[ i ] - y[ 3 - i - j ] );
      if( a2 != ( x[ j ] - x[ 3 - i - j ] ) * ( x[ j ] - x[ 3 - i - j ] ) + ( y[ j ] - y[ 3 - i - j ] ) * ( y[ j ] - y[ 3 - i - j ] ) ) continue;
      int g2x = x[ i ] + x[ j ];
      int g2y = y[ i ] + y[ j ];
      cout << g2x - x[ 3 - i - j ] << " " << g2y - y[ 3 - i - j ] << endl, exit( 0 );
    }
  cout << -1 << endl;
  return 0;
}