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:
['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']

Ex Output:
69093


Ex Input:
['f', 'H', 'U', 'l', 'n', 'q', '2701', '339', 'X', 'H', 'O', 'q', '2313']

Ex Output:
5353


Ex Input:
['3359', '7257', 'G', '4805', 'a', '901', '7777', '8289', '9607', '4711', '1705', 's', 'J', 'a']

Ex Output:

48411