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:
['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']

Ex Output:
10061


Ex Input:
['h', '2295', '2913', 'I', '5273', 'L', '2739', '8227', '6537', 'e', '6491', '5463', 'i', '4337', '537']

Ex Output:
44812


Ex Input:
['L', 'K', 'M', 'I', 'K', '6771', '3653', 'n']

Ex Output:

10424