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:
['l', '5369', 'z', 'U', 's', '2357', '3367', 't', '6539', 'K', 'a', 'Q', 'x', 'e', '6459', 'K', 'B', 'f', 'j']

Ex Output:
24091


Ex Input:
['Y', '9053', 'N', '6921']

Ex Output:
15974


Ex Input:
['Z', 'i', 'j', '477', '6501', 'q', '3793', 'B', 'p', 'C']

Ex Output:

10771