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:
['v', '3135', 'J', 'm', 'a']

Ex Output:
3135


Ex Input:
['b', 'i', '7807', 'g', '1611', '6733', 'V', '561', 'C', '8575', 's', 'E', '8129', 'F']

Ex Output:
33416


Ex Input:
['u', '5851', 'a', 'w', 'k']

Ex Output:

5851