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:
['5347', 'E', 'a', '5379', '405', '1171', 'v', 'J']

Ex Output:
12302


Ex Input:
['773', 'e', '4451', 'S', 'I', 'r', 'e', 'V', 'Q', 'g', 'J', 'L', '7655', 'O']

Ex Output:
12879


Ex Input:
['s', '9545', 'D', 'g', '4269', 'N', 'm', 'M']

Ex Output:

13814