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:
['p', 'V', '673', '8483', 'S']

Ex Output:
9156


Ex Input:
['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']

Ex Output:
17914


Ex Input:
['O', 'M', 'i', '6017', '9789', 'h', '481', 'g', 'd', '3027', 'K', '6013', 'W', 'Z', 'R', 'C']

Ex Output:

25327