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:
['N', 'e', '4283', '3243', '5581', '1407', 'q', 'y', '6685', 'v', 'c', '5995']

Ex Output:
27194


Ex Input:
['t', 'G', '217', 'W', 'l', 'j', 'd', 'U', '6795', '1609', 'n', '6919', '617', '5753']

Ex Output:
21910


Ex Input:
['6625', 'Y', 'n', 'D', 'j', '1553', 'G', '2703', 'O', 'l', 'T', '3681', 'X', '7893', '3803', 'd', '8517', 'P', 'E']

Ex Output:

34775