Given a string s, reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1:

Input: s = "Let's take LeetCode contest"
Output: "s'teL ekat edoCteeL tsetnoc"

Example 2:

Input: s = "God Ding"
Output: "doG gniD"

Constraints:

• 1 <= s.length <= 5 * 104
• s contains printable ASCII characters.
• s does not contain any leading or trailing spaces.
• There is at least one word in s.
• All the words in s are separated by a single space.

SOLUTION:

class Solution:
    def reverseWords(self, s: str) -> str:
        s = list(s) + [""]
        chunk = ""
        op = ""
        for c in s:
            if c == " " or c == "":
                op += chunk
                op += c
                chunk = ""
            else:
                chunk = c + chunk
        return op