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:
['y', 'R', 'b', 'v', 'm', 'H', '9903', '8689', 'D', '1023', 'a', '233', '1833', 'o', 'n', 'm', '5531']

Ex Output:
27212


Ex Input:
['4401', 'p', 'V', 'l', 'H', '7329', 's', '4717', 'l', '1773', '67', '179', 'l', '6991', 'a', '9377']

Ex Output:
34834


Ex Input:
['5289', '1701', '5925', '7973', 'F', 'V', 'y', '5903', 'i']

Ex Output:

26791