Hello, and welcome! Are you ready to take your string manipulation skills in Python to the next level? Today, we'll explore a task that not only enhances your understanding of strings but also trains your ability to think creatively. The task at hand involves splitting a string into words, then reversing each word as if reflected in a mirror. Intrigued? Let's dive right in!

Consider a string filled with words. Your task is to write a Python function that accepts such a string. It then takes each of those words, reverses their character order, and, finally, stitches them all together to form a new string with reversed words.

Here's what you need to keep in mind:

• The input string will contain between 1 and 100 words.
• Each word is a sequence of characters separated by white space.
• A word is composed of characters ranging from a to z, A to Z, 0 to 9, or even an underscore _.
• The given string will not start or end with a space - double spaces will not appear either.
• After reversing the words, your program should return a single string with the words preserving their original order.

Example

Suppose that the input string is "Hello neat pythonistas_123".