The center of the Universe

GIven a string, return the middle elements as shown in the example.

Sample Code:

function middleMan(str) {
// Enter your logic here...
}

Examples:

Input: 'Codetisan'
Output: 't'
Explanation: 't' is the middle point of the input string.

Input: 'Universe'
Output: 've'
Explanation: 've' is the middle point of the input string.