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:
['D', '7807', '9395', 'T', 'c', '5139', '2827', 't', 'T', 'm', '3717', 'U', '3225', '7419', '2481', 'p', 'C', '5277']

Ex Output:
47287


Ex Input:
['z', '447', '9781', 'R', '6083', 'u', '9229', 'Z', 'F', '2437', '9677', 'n', 'G', '6763', '5883', 'B', '9563', '4575']

Ex Output:
64438


Ex Input:
['8005', '2139', '5485', 'l', 'w', '4873', '5469', '2475', '4719', 'p', '4147', '4397']

Ex Output:

41709