import java.io.*;
import java.util.StringTokenizer;

class Main{

static final PrintWriter out=new PrintWriter(System.out);

public static void main(String[] args) throws IOException{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String line="";
while((line=br.readLine())!=null&&!line.isEmpty()){
int[] x=new int[3];
int[] y=new int[3];
StringTokenizer st=new StringTokenizer(line);
for(int i=0;i<3;i++){
x[i]=Integer.parseInt(st.nextToken());
y[i]=Integer.parseInt(st.nextToken());
}
int a=(x[0]-x[1])*(x[0]-x[1])+(y[0]-y[1])*(y[0]-y[1]);
int b=(x[2]-x[1])*(x[2]-x[1])+(y[2]-y[1])*(y[2]-y[1]);
int c=(x[0]-x[2])*(x[0]-x[2])+(y[0]-y[2])*(y[0]-y[2]);
if(a==b&&a+b==c) out.printf("%d %d\r\n",x[0]+x[2]-x[1],y[0]+y[2]-y[1]);
else if(b==c&&b+c==a) out.printf("%d %d\r\n",x[0]+x[1]-x[2],y[0]+y[1]-y[2]);
else if(c==a&&c+a==b) out.printf("%d %d\r\n",x[1]+x[2]-x[0],y[1]+y[2]-y[0]);
else out.printf("%d\r\n",-1);
out.flush();
}
}
}