Program Lx;
Var
  x1, x2, x3, x4, y1, y2, y3, y4: Double;
Begin
  Repeat
    Read(x1, y1, x2, y2, x2, y2, x3, y3);
    x4 := x3 + x1 - x2;
    y4 := y3 + y1 - y2;
    Writeln(x4:0:3, ' ', y4:0:3)
  Until Eof;
End.