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:
['T', '721', '6555', 'g', 'y', 'U', '3053', 'A', '9663']

Ex Output:
19992


Ex Input:
['8109', '5635', 'u', 'M', '1009']

Ex Output:
14753


Ex Input:
['6137', 'D', '2347', '2147', '3159', 'e', '99', 's', 'b', 'V', 'P', 'N', '1369', 'u', '7245', '933']

Ex Output:

23436