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:
['z', 'c', 'E', 'Q', '1839', 'g', 'X', 'c', '291', 'c', 'w', 'e', '5957', 'X', '6471', 'A', '8359', 'y', '3611', '5417']

Ex Output:
31945


Ex Input:
['1845', '273', '6921', 'u', '165', 'n', 'y', 'I', 'u', 'X', '5503', 'L', 'G', 'V', '6223', '1123', 'v']

Ex Output:
22053


Ex Input:
['7343', 'K', '8169', '8549', '1045', '2549', '1863', '8247', '5599', 'g', 'b', 'k']

Ex Output:

43364