Is it possible to make M-C-p and M-C-n global aliases for M-down and M-up?

[Steinar Bang]

The up and down arrows on my laptop keyboard are worn and flaky.

(I've cleaned dirt under the arrow keys and that made them work a little
better, but I'm afraid I may have damaged the keys a bit, removing
them.  So... still a bit flaky, especially the down arrow).

Is it possible to make M-C-n a global alias for M-down, and to make
M-C-p a global alias for M-up?

I.e. make them aliases across modes?

Thanks!


- Steinar