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:
['h', 'a', '1645', '2391', '759', '519', '3331', '2831', '3427', '9893', 'u', 'J', '7391', '8379', 'V']

Ex Output:
40566


Ex Input:
['s', 'M', 'U', '5383']

Ex Output:
5383


Ex Input:
['1869', '8045']

Ex Output:

9914