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:
['C', '9973', 'b', '693', 'y', 'H', 'C', 'P', 'b', 'J', 'f', 'T', '2317', 'O', '5755', '8201', 'p', 'y', '8721', 'i']

Ex Output:
35660


Ex Input:
['c', 'd']

Ex Output:
0


Ex Input:
['F', '9353', 't', 'M', 'h', '2099', 'd', 'f', '8901', '1971', 'Z', '4655', 'U']

Ex Output:

26979