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', '6937', 'U', 'f', 'S', 'm', '9699', 'E', '4559', 'p', 'Z', 'o', '6409', 's', '4537', '5135', '6901', '6489', '5833', 'l']

Ex Output:
56499


Ex Input:
['K', '9121', 'y', '4233', '1513', 'd', '5609', 'C', 'q', 'p', 'S', '627', 'q', 'I']

Ex Output:
21103


Ex Input:
['A', '8173', 'p', 'q', '481', 'S']

Ex Output:

8654