I'm looking for a discrete code for the "next chapter" button for a Samsung TV. The idea is that it would (hopefully) be sent out through CEC.

Whether this would work on my TV or not is something to test, but I ran into this photo of a Samsung remote that looks very similar to mine, except it has the "previous chapter" and "next chapter" buttons on it. Apparently a long-press activates them.

I've had no luck tracking down these codes, and would appreciate any help I can get in finding them.

Thanks!