Learn String Manipulation by Building a Cipher - Step 16

I have no clue what else it needs.

I’ve assigned “shifted” var to index+shift in the “alphabet” var.
When I print “shifted”, it even gives the proper translation.
When I click Check code, it says I still have to assign it.
Could some kind soul help me? Maybe I misunderstood the task.

My code so far

text = 'Hello World'
shift = 3
alphabet = 'abcdefghijklmnopqrstuvwxyz'
index = alphabet.find(text[0].lower())
print(index)
shifted = alphabet[shift+index]
print(shifted)

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Challenge Information:

Learn String Manipulation by Building a Cipher - Step 16

in this line, put index first, meaning,

index + shift

try that

Yes, perfect.
It worked.
I feel like it should be interchangable but i don’t make the rules.
I bet theres a completely reasonable yet complicated reason as to why index should come first.
Thank you so much.