How to define a window's position (Tkinter)

[Harlin Seritt]

I am trying to use the geometry() method with the toplevel window
called root. I know that one can do the following:

root.geometry('400x400+200+200')

This will put the window in 200, 200 position with a size of 400x400.
Now, I don't really want to set the size. I simply want to set the
position of the window. I've tried this:

root.geometry('200+200')

However, this doesn't seem to work. What can I do to set the position
of the window without actually setting the size?

Thanks,

Harlin