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:
['8591', 'J', 'l', 'l', '7023', 'N', 'n']

Ex Output:
15614


Ex Input:
['1287', 'r', '7865', '7097', '7485', 'p', 'R', 'F', '3453', '1833', '4699', 'x', 'j', 'G']

Ex Output:

33719