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:
['O', '6337', 'j', '6009', 'z']

Ex Output:
12346


Ex Input:
['D', '9679', 'e', '5537', 'G', 'l', '2653', 'a', 'Y', '8467', 'q', 'L', '7239', 'O']

Ex Output:
33575


Ex Input:
['x', '1887', 'E', '3995', '5677', '2749', '9951']

Ex Output:

24259