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:
['K', 'O', 'p', '1669', '8647', '3417', 'a', '8903', 'V', 'E', 'l', 'a', '5177', 'J', '6559', '5377', 'X', '9427']

Ex Output:
49176


Ex Input:
['n', 'm', 'Y', 'v']

Ex Output:
0


Ex Input:
['8195', 'm', '9497', '5323', '4701', '3057', 'P', '9423', '267', '3125', 'n', '3989', 'W', '9843', '2949', 'g', 'E']

Ex Output:

60369