It has 4 places but since you start counting at 0 your initials[4] is already out of bounds.

Not a kata issue.

Ah I see. Thank you. I thought that, as the initials array was origninally setup(dont know the right terminology) to have four indexes, I had to make sure that both were addressed.

I'm not sure why exactly, but modifying initials[4] causes this. You shouldn't be modifying data out of bounds :P

In what language?

Knowing your code would also help to find problems in your solution.

When I run it, based on the description my code produces the right answer but then the expected it some weird answer. E.g. Sam Harris should be S.H which is what my code produces but then it says the expected is "te" or the expected will be empty.

Ahh, i see. This makes a lot of sense. Thank you for your reply :).