x[6],i,a,b,c;main(d){for(;~scanf("%d",x+i++););for(i=4;a=x[2]-*x,b=x[3]-x[1],c=x[4]-*x,d=x[5]-x[1],a*c+b*d|a*a+b*b-c*c-d*d&&i+2;i-=2)*x^=x[i]^=*x^=x[i],x[1]^=x[i+1]^=x[1]^=x[i+1];i+2&&printf("%d %d",x[2]+c,x[3]+d)||printf("-1");exit(0);}