String Concatenation Program

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Your question is String Concatenation Program. Start with the requirements on the right.

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Problem

A ValueMomentum QA validation utility receives two message fragments that must be joined before reporting the final result. Write a function that concatenates the two input strings in their original order without adding, removing, or changing characters.

Formal Specification

Implement concat_strings(first, second).

Input: Two strings, first and second.
Output: One string equal to first followed immediately by second.
Preserve capitalization, punctuation, whitespace, and repeated characters exactly.
Do not insert an automatic separator such as a space or newline.

Constraints

0 <= len(first), len(second) <= 10^5
Both inputs contain valid Python string characters
The combined output length is at most 2 * 10^5 characters
The inputs may be empty

Function Signature

def concat_strings(first, second):

Your solutionPython 3

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