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:
['h', '9539', '3373']

Ex Output:
12912


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

Ex Output:
22053


Ex Input:
['U', 'i', 'S', '1271', '3839', 'l', 'h', '4727', 'C', '1215', '5405', '6785', '3625', '219', '8287', '3297', 'p', '6777', 'p', 'q']

Ex Output:

45447