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:
['R', 'k', '3355', 'Y', '6635', 'M', '4839', 'T', 'd', '495', 'g', 'E', 'g', 'F', 'S', '5377', 'g']

Ex Output:
20701


Ex Input:
['4997', '5005', '6773', 'q', 'K', '8391', '7303', 'K', 'N', '5417', '8573', 'z', '8653', '8343', 'm', 'L', '1587', 'p', '5323']

Ex Output:
70365


Ex Input:
['9289', 'T', 't', 'V', '4641', '2345', '4905', 'o', 'c', 's', '9713', '3173', 'Z', 'a', 'k', '9989', 'V', 'g', 's']

Ex Output:

44055