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:
['6293', 'o']

Ex Output:
6293


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

Ex Output:
21912


Ex Input:
['h', '8479', '7785', '93', 'S', 'V', '1629', 'z', 'd', 'L', '7759']

Ex Output:

25745