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:
['z', 'E', 'u', '4437', '7767']

Ex Output:
12204


Ex Input:
['9125', '1443', '2303', 'O', '8463', '401', '3983', 'g', '4327', 'z', 'n', 'F', 'Q', 'j', '9885']

Ex Output:
39930


Ex Input:
['d', 'e', '9739', '1195', 'o', '4829', 'm']

Ex Output:

15763