Guys, you are learning python, a programming language. NEVER, EVER go on with a mistake you fixed by lack and you did not understand. I can see that you have no idea what you did wrong and what right, and you even think that right doesnt make sense... Make sure to READ all the instructions before doing the exercises
Now, the explanation. You assigned to "middle" the string or strings "suitcase[2:3]". The exercise asks you to get the third and fourth items. Now, sure, we count from 0, so third is 2, fourth is 3. That is correct, BUT, the list slicing gets the items from the first index given WITH the item on the first index given, BUT it stops at the second index given, without getting it's item.
That's why suitcase[2:3] only gives "passport", because the slicing stops right before the index given second(in this case, 3), so it's like just getting suitcase.