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:
['T', 'n', '8513', '5565', '6343', '1403', '975', '6959', '8049', '1601', 'j', 'Q', 'O', '7889', 'r', 'D', '1903', '6607']

Ex Output:
55807


Ex Input:
['9863', 'y']

Ex Output:
9863


Ex Input:
['5977', '8545', '6209', 'r', '2779', '5715', 'S', 'a', '1133', 'G', 'G']

Ex Output:

30358