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:
['1395', '3605', '6001', 's', 'h', 'T', 'K', 'X', '9413', 'X', '5099', 'c', 'f', 't', 'S', 'f', '4651']

Ex Output:
30164


Ex Input:
['O', '6337', 'j', '6009', 'z']

Ex Output:
12346


Ex Input:
['2663', 'u', 'g', 'w']

Ex Output:

2663