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:
['y', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']

Ex Output:
5708


Ex Input:
['H', 'i', '8085', 'E', 'q']

Ex Output:
8085


Ex Input:
['o', 'o', 'X', '4635', '1819', 'b', 'O', 'h', 'O', 'n', '2311', 'R', 'M']

Ex Output:

8765