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:
['D', '5207', 'E', '119', 'g', '2991', 'G', 'g', 'u']

Ex Output:
8317


Ex Input:
['4515', '3911', 'M', 'T', 'w', 'F']

Ex Output:
8426


Ex Input:
['E', 'Q', '6381', 'k', '4955', 'A', '6551', 'w', '2215', 'D', '4941', '9873', '3423', '6371', 'G', 'G']

Ex Output:

44710