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:
['c', 'r', 'R', 'a', '6915', 'C', '3651', 'j', 'L', '9761', '2923', 'Z', 'e', '833', 'W', '1867', 'G', 'H', 'T']

Ex Output:
25950


Ex Input:
['M', 'F', '4477', '1565', '4407', 'r', 'v', '7237', '83', '5243', 'O', 'z', 'W', '7703', 'Q', 'i', '9657', 'n']

Ex Output:
40372


Ex Input:
['D', 't', 'b', 'n', 'N', 'X', '425', 'b', '9575', '3351', '2195', '5105', '2363', 'o']

Ex Output:

23014