Implement Caesar Cipher Shift 4

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Your question is Implement Caesar Cipher Shift 4. Start with the requirements on the right.

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Problem

Implement a Caesar cipher encryption that shifts each letter by 4 positions (e.g., A->E, V->Z, W->A). Preserve uppercase and lowercase characters, and leave digits, spaces, punctuation, and other non-letter characters unchanged. Implement def caesar_cipher(text):, accepting a string and returning the encrypted string. For example, "Attack at Dawn!" returns "Exxego ex Hear!", and "XYZ xyz" returns "BCD bcd".

Constraints

0 <= len(text) <= 10^5
text contains standard ASCII characters
The shift is always exactly 4 positions
Uppercase and lowercase letters must retain their case
Non-letter characters must remain unchanged

Function Signature

def caesar_cipher(text):

Your solutionPython 3

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