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:
['S', '1249', '6233', 'I', '6733', 'r', 'A', 'E', 'h', 'x', 'p', 'c', '515', '1029', '1593', '1035']

Ex Output:
18387


Ex Input:
['J', 'm', '1255', 'S']

Ex Output:
1255


Ex Input:
['B', 'J', 'v', 'l', '1779', '1133', '4117', '2699', '4865', '8199']

Ex Output:

22792