# Learn String Manipulation by Building a Cipher - Step 16

### Tell us what’s happening:

Step 16
As you can see from the output, `"h"` is at index `7` in the `alphabet` string. Now you need to find the letter at index `7` plus the value of `shift`. For that, you can use the addition operator, `+`, in the same way you would use it for a mathematical addition.

Declare a variable named `shifted` and assign it the `alphabet` letter at `index` plus `shift`.

done this much code so far cant get past this now

``````
/* User Editable Region */

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

/* User Editable Region */

``````

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### Challenge Information:

Learn String Manipulation by Building a Cipher - Step 16

// running tests You should assign the

``````alphabet
``````

letter at the index

``````index + shift
``````

to your new variable. // tests completed

gives me error

You should assign the value of `alphabet` at the index `index + shift` to the `shifted` variable.

You need to use the square bracket notation to access the right index of alphabet, in a similar way as you already did before:

what does this mean? i read this 20 times and still dont get it

Right now, `shifted` is a number (the sum of `index` + `shift`).
You need to use that sum (`index + shift`) to access a character in `alphabet`.
How do you access the value located at a specific index within a string?

[0 ] where do i put it

You don’t need `[0]`. You have to place the square bracket after `alphabet` and put `index + shift` in them. This is what you need to assign to `shifted`.

alphabet [ index + shift ] = ‘abcdefghijklmnopqrstuvwxyz’
did that was wrong.
do i need to make a new line?

Leave this line as it is:

The only thing you need to change is the right part of this:

fk im dumb
thanks

Mod Edit: Removed Solution