You can make your function print the input.

^_^

Not a kata issue. Also, no mention of which language. Closing.

I agree. Code golf is more of a puzzle/for fun than pratical programming.

I love puzzles, too! Hence, I really enjoy this series.

I'm not even geting what it is that should be returned

A number :D (look at the test cases)

You won't get any hints here, because it's a puzzle. The only reasonable way to solve this is for you to try and figure out a pattern, by looking at the test cases. If you can't do it, leave it for another day.

sorry, that's just the way it is with this Thinking & Testing series, you have to deduce the situation on your own based on the input... good luck!

If you get that error, change your language version to 3.6.0
I can't select other version, but to some people, 3.4.3 is shown too.

Return, for each word, the number of letters that occupy the same positions as in the alphabet.