Kindly solve this question in C++ programming language.

A palindrome is a word, which reads the same backward as forward. Some examples of palindromes are: "kayak", "radar", "mom". Write a function: class Solution \{ public String solution(int N, int K ); } that, given two integers N and K, returns a palindrome of length N which consists of K distinct lower-case letters (az). Examples: 1. Given N=5,K=2, your function may return "abbba". There are many other possibilities; for example, it could also return "zdzdz". On the other hand, "aaaa" is an incorrect answer as it contains only one distinct letter. 2. Given N=8,K=3, your function may return "ppsccspp". 3. Given N=3,K=2, your function may return "opo". Assume that: - N is an integer within the range [1..200]; - K is an integer within the range [1..26]; - Creation of the required palindrome is always possible. In your solution, focus on correctness. The performance of your solution will not be the focus of the assessment