@Nova-Striker, shifting eu by 10 characters will still return eu.

That is understood , but why the first word eu did not become ue ?

In step 2, you rotate the entire string (sans spaces) by 10 characters. In step 4, you do the same but for each individual word; here, "word" means a group of consecutive non-space characters.

As an example, in step 3 we see the last word is tinventth. If you rotate by 10 characters, you get htinventt.

This Kata looks very interesting and I am eager to start on it, however I do not understand what step 4 from encode requires.

I looked at the example in the description but I still can't understand it.

Can you please explain?

Superb, it baffled me how efficient your solution is when I used timeit to to see how fast it runs. Looks like you have earned another follower, I bookmarked your blog.