You are given a string s consisting of lowercase English letters and the special characters: *, #, and %. Build a new string result by processing s according to the following rules from left to right:

给你一个字符串 s，由小写英文字母和特殊字符：'*'、'#' 和 '%' 组成。 同时给你一个整数 k。

You are given a string s consisting of lowercase English letters and the special characters: '*', '#', and '%'. You are also given an integer k. Build a new string result by processing s according to the following rules from left to right: