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:
['S', '1249', '6233', 'I', '6733', 'r', 'A', 'E', 'h', 'x', 'p', 'c', '515', '1029', '1593', '1035']

Ex Output:
18387


Ex Input:
['a', 'q', '4085', '6327', '6869', 'Z', 't', '7057', '1965', 'p', 'o']

Ex Output:
26303


Ex Input:
['1391', '1719', '8547', 'x', 'a', 'j', '6395', 't', '3421', '6607', 'M', '1645', 'H', 'x', 't']

Ex Output:

29725