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:
['3883', 'T', '6175', 'B', '4365', '3719', 'V', 'B', '3173', 'K', 'Z']

Ex Output:
21315


Ex Input:
['Q', 'O', '2649', '9627', 'K', '1397', '2667', 'e', '7117']

Ex Output:

23457