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', 't', 'W', '163', 'v']

Ex Output:
163


Ex Input:
['3319', 'e', 'c', 'G', '2399', '1557', '4813', 'z', 'U', '4895', 's', '1193', 'A', 'G']

Ex Output:
18176


Ex Input:
['9757', 'I', 'W', '1945', 't', '3293', '77', '4815', '8889', 'y', 'j', '4143', 'b', 'K', 'Y', 'e', 'h', 'F']

Ex Output:

32919