Am I allowed to use UE4 assets in UDK?

I found that we are not allowed to do the opposite but can I use assets that came with UE4 into UDK project? For example the default UE4 3rd person character mesh + animations.
The project will be absolutely free (no ads or something) if that matters.

And if we can use UE4 assets, are we allowed to use assets from UE4 market plase into UDK?

UE4 content under the UE4 EULA and/or Marketplace are not licensed for use with UDK. We strongly encourage you to use UE4 rather than UDK.