That's a good point, how could I miss that!!! The link has a good answer by the way.
My attention was drawn to somwhere else, in the answer. A and B are correct:
A. The output could contain 30
B. The output could contain @bf73fa
The first is pretty obvious, what I can't figure out is how to calculate the second. I am guessing that it might be the String representation of Suits.values() array object. But I still don't know how I can come up with this answer without actually running the code on the machine.