Reverse String With Special Characters | Dataford Interview Questions

Reverse a string while keeping special characters in place.

Treat alphabetic characters as reversible and every non-letter character, including digits, punctuation, and spaces, as fixed. Return a new string with the letters reversed and all other characters unchanged at their original indices.

Input and Output

The function receives one string s and returns a string. The input may contain uppercase and lowercase English letters, digits, punctuation, spaces, or no characters.

Constraints

0 <= len(s) <= 10^4
The input contains printable ASCII characters
Only alphabetic characters are reversed
Digits, punctuation, spaces, and other non-letters remain fixed

Function Signature

def reverse_string_preserve_specials(s):

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