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:
['3051', '5343', 'k', 'k', '6815', 'E', '4745', 'A', 'A', '1251', '6649', 'f', '4133', 'X']

Ex Output:
31987


Ex Input:
['Y', '263', '641', '1163', 'p', 'r', 'L', '4425', 'C', '7585']

Ex Output:
14077


Ex Input:
['2273', '3819', 'x', '99', 'N', '9973', '9219', '6433', '9005', '8949', '6847', 'r', 'R', 'I', 'e', 'e', 'o']

Ex Output:

56617