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:
['f', 'H', 'U', 'l', 'n', 'q', '2701', '339', 'X', 'H', 'O', 'q', '2313']

Ex Output:
5353


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:
['1563', 'v', '5191', 'B', 'O', '6851', 's', 'Z', 'p', 'Z', 't', '4525', '9105', '683', '3677', '6393', 'H']

Ex Output:

37988