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:
['83', 'k', 'p', 'o', 'b', '7819', '2089', '4141', 'c', 's', '6045', '6783', 'J', 'B', 'x', 'O', 'X', '9693']

Ex Output:
36653


Ex Input:
['J', 'S', 'S', 'U', 'w', '7691', '7529', 'B', '3861', '4557', 'd', '569', '1547']

Ex Output:
25754


Ex Input:
['M', '9933', '9861', 'f', 'N', 'R', '7625', 'p', 'T']

Ex Output:

27419