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:
['A', '771', 'Q', 'b', '9929', '4991', 'q', '9863', '4363', '5721', 'C', '991', 'j', 'r', 'Q', 'B', 'K']

Ex Output:
36629


Ex Input:
['5199', 'h', 'T', 'T', 'l', '1661', 'p']

Ex Output:
6860


Ex Input:
['9867', '3455', 'I', 'O', '4461', 'y', 'e', '6433', 'E', '4239', 'G', '8513', '7311', '9743', 'L']

Ex Output:

54022