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

Ex Output:
33575


Ex Input:
['1969', 'm', 'Y', 'N', '7331', 'J', 'b', '2485', 'x']

Ex Output:
11785


Ex Input:
['H', '2539']

Ex Output:

2539