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:
['4161', 'E']

Ex Output:
4161


Ex Input:
['D', 'K', 'n', 'd', 'i', 'U']

Ex Output:
0


Ex Input:
['o', 'H', 'I', '3253', 'q', 'f', 'r', 'K', '8105']

Ex Output:

11358