Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Which coaxial is "in" and which is "out" --it does not seem to be marked.
Document: I never though I would review a surge protector, but then again this is a pretty great one. It's incredibly thin compared to the surge protectors of days past, which is a definite plus in terms of aesthetics. There are six outlets that are designed for block-style plugs, which is a god send since most surge protectors don't keep that in mind. They can also slide shut to keep dust/fingers out. The coaxial protection does not seem to degrade signal quality at all which is a definite plus.
I like this outlet because it is flat and not fat. I can hide it behind my TV by mounting on the wall instead of leaving it on the floor. Seem to work fine so far.
I use these to protect expensive electronics equipment at work. I have not had a problem with one yet. They seem very solidly built and are laid out so you can plug in several power bricks.
I had ordered the Belkin Pivot head version of this surge protector but they changed my order to this one with out telling me. But since they seem to have taken down the page for the pivot one, I am stuck with this one.
Product is well made except there is no network protection (yes I know it is not specified as having it)and the telephone ports and cox ports are not labeld as in/out. This may not make a difference but other surge protectors seem to label them.
It would help if the pictures, images and descriptions in an item on Amazon always said and showed the same details because right now they seem to be just "representative" not actual.Anyway, I am happy as a clam with this item because what arrived is what I wanted.
The sideways outlets are really a pretty revolutionary idea, they're perfect for fitting those awkward power bricks that routers and video game systems seem so found of. No longer will one device occupy 3 plugs!
This is, I'm sure, so that you can plug multiple ones into the same outlet (bad idea) but it is an inconvenience for me because my cord needs to run to the left from the outlet.The co-ax protection does not seem to degrade my signal strength as reported by my television, contrary to some of the other reviewers.
Belkin surge protectors usually seem to be good quality, and this one is no exception. I haven't had a chance to test it's surge protection (this doesn't seem to be a problem where I live, no electrical storms, etc), but thus far it has performed as expected.
It's a surge protector... I have had no power surges. Hard to give it an accurate rating without having seen it in action. Still, all of the components I have plugged in seem to work just fine... so I guess the five stars I'm giving it is justified. Anyways... there it is.
Answer: Folks: They are marked.  Remove the cable dressing plastic device and the markings are right below it.  Now, why anyone in their right mind would cover them is a different question. Incidentally, the phone jack furthest from the coaxials is the "In"The other two are the Öut" and the coaxial closest to the phone jack is the "In".