Removing Stars From a String

You are given a string `s`, which contains stars `*`. In one operation, you can: 1. Choose a star in `s`. 2. Remove the closest non-star character to its left, as well as remove the star itself. Return the string after all stars have been removed. **Note:** - The input is generated such that the operation is always possible. - It can be shown that the resulting string is always unique. **Example 1:** - Input: `s = "leet**cod*e"` - Output: `"lecoe"` - Explanation: - Remove `t` with 1st `*`: `lee*cod*e` - Remove `e` with 2nd `*`: `lecod*e` - Remove `d` with 3rd `*`: `lecoe` **Example 2:** - Input: `s = "erase*****"` - Output: `""` **Constraints:** - `1 <= s.length <= 10^5` - `s` consists of lowercase English letters and stars `*`. - The operation above can be performed on `s`.