In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.

Ex Input:
['e', '9777', '1835', 'N', '2425', '1427', 'o', '4459', '9961', '3285', '5199', 'x', 'e', '7727']

Ex Output:
46095


Ex Input:
['4437', '1265', '1519', 'K', 'Q', 'b', 'n', 'J', '6631', 'K', 'q', 'D', 'U', 'u', '3653', '5169', 'L', 's']

Ex Output:
22674


Ex Input:
['S', 'u']

Ex Output:

0