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:
['2237', '2597', '2593', 'Y', '5345', 'g', 'l', 'I', 'p', 'u', 'L', 'T', '617', '9759', 'b', 'w', '7097', '9863']

Ex Output:
40108


Ex Input:
['4949', '2459', 'n', 'f', 'n', 'v', '8421', '1519', '4859', 'c', '9923', '2829', 'K', '4937', 'W', 'R']

Ex Output:
39896


Ex Input:
['x', '5259', 'T', 'L', 'C', 'H', '2493', 'u', '3851', '2439', 'U']

Ex Output:

14042