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:
['w', 'V', '3359', '8847', '7551', '2481', 'Y', 'j', 'L', 'G', '7905', 'v', '4141', '2229', 'k', 'H', '3517', '3885', '3665', 'O']

Ex Output:
47580


Ex Input:
['2691', '3861', '7087', '4661', '6527']

Ex Output:
24827


Ex Input:
['C', 'y', 'V', '887', 'F', '465', 'x', '3043', 'l', '8387', '8983']

Ex Output:

21765