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:
['5331', 'f', '2865', '6019', 'U', 'm', 'g', 'n', 'Y', 'A']

Ex Output:
14215


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:
['465', '5925', 'N', '7775', '3527', '739', 'x', '1197', '2391', '1513', '3085', 'y', '7163', 'O', '6199', 'm', 'v', 'h', 'O']

Ex Output:

39979