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:
['5347', 'E', 'a', '5379', '405', '1171', 'v', 'J']

Ex Output:
12302


Ex Input:
['M', '9933', '9861', 'f', 'N', 'R', '7625', 'p', 'T']

Ex Output:
27419


Ex Input:
['6351', 'g', '2741', '4255', '4577', 'A', '9669', 'G', 'S', 'r']

Ex Output:

27593