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:
['n', 'W', '565', '6625', '903', 'o', '7995', '8339', '5251', 'e', 'a', '1081', '5813', 'o']

Ex Output:
36572


Ex Input:
['U', 'd', '893', 'h', '9679', '315', 'H', '339', '2381', '847', '7951', 'e', '9269', '9081', 'o', '6439', 'N', '4531']

Ex Output:
51725


Ex Input:
['C', 'E', 'P', '6579', 'r', '3531']

Ex Output:

10110