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:
['S', 'D', '3101', '4967', '8197', '5025', '4257', 'S', 'X', '7641', 'n', '6775', '4719', 'o', '2821', 'x', '5605', '2181']

Ex Output:
55289


Ex Input:
['8743', 'Y', 'O', '8265', '1029', '5689', 'F', 'j', 'Z', 'i', 'S', '1285', '737']

Ex Output:
25748


Ex Input:
['3435', 'p', '9621', 'v', 'J', '7437', '287', '5703', 'm']

Ex Output:

26483