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:
['q', 't', '4837', 'F', '2367', '1867', '8361', 'm']

Ex Output:
17432


Ex Input:
['S', 'W', '2171', '6405', 'h', 'C', '1597', '7109', 'Q', 'p', '2747', 't', 'J', 'q', '1883', 'v', 'O']

Ex Output:
21912


Ex Input:
['u', '1633', 'm', '3529', 'w', '4643', '9901', '723', 'H', '6259', 'S', '2707', '9337', '8159', '4923']

Ex Output:

51814