Closing as question seems to be resolved

It's hard for everybody, because the problem is not well-specified.

"Take every 2nd char" is NOT good English -- instead, it should read "take every OTHER char".

(In fact, if taken literally, the wording would mean to output the "2nd char" only, because there is only one "2nd char" in the input; of course that's silly and nobody reads it that way.)

The author of this Kata presumably speaks German (going from his name), and in German the phrase is "take every 2nd char". So it's German translated into bad English.

Also, the problem is not clear about which character to output first; of course this can be inferred from the examples, but the problem text should be clear about this in the first place.

Please fix the wording!

Fixed

To those who cant pass the kata:
think about what the Robot have known before its first learning!

Its really a fun trick lol

In Java Verdion I cant understand what the question means
and I check the Discourse and see

To every who cant understand "every 2nd char"
That means "every character of EVEN positions"

Oh , its just a bit hard for those whose first-language was not English like me.

Have fun :)

JAVA Leaner
In fact 5/2 should return 2 if the function return int,
but the example say it would be 2.5,
of course,2 pass the test.
some one should edit it