Reversing string and toggle lower-upper-case
<p>I need to write an application which takes a String as input. After processing, it should print out the string reversed, and all characters switched from lower to uppercase and vise versa. I want to achieve this using a <code>StringBuilder</code>.</p>

<p>Sample run:<br>
Input: Hello Human<br>
Output: NAMUh OLLEh</p>
