Name abbreviation
Return an abbreviation of the given string.
Sample Code:
def abbName(s):
# Enter your logic here...
Examples:
Input: 'human being'
Output: 'H.B'
Explanation: Capitalized first letters separated by a dot.
Input: 'Batman the Suparman'
Output: 'B.T.S'
Explanation: Capitalized first letters separated by a dot.
