Challenge: Output with Lambda Expressions

Problem statement

Write a C++20 program that defines a function braces that returns a lambda function which takes a parameter v and returns a string composed of the characters a, v, and b. The main function should then create four such lambda functions using different pairs of characters for a and b: ( and ), [ and ], { and }, and | and |.

It should loop over the integers from $1$ to $$ ...