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:
['V', 'h', '5549', 'K', 's', '8337', 'Y', '497', 'z', 'T', '4467', '6333', 'M', '1573', 'y', 'O', '5499', 's', 't', '6205']

Ex Output:
38460


Ex Input:
['9445', '7291', 'r', 'g', '1175', '7823', '5507', 'j', '7249', '6335', '3853', 'b', 'u', 'S', '365', 'Z', '7489', 'S', 'W', 'e']

Ex Output:
56532


Ex Input:
['L', 'a', '197', '2135', '271', 'p', '7215', '9653', 'y', 'c', 'A', '6959', 'A', '5749', 'W', '7259', '3797', 'R', 'x']

Ex Output:

43235