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:
['1319', '6105', '1119', 'c', 'p', '7617', '5113', 'a', '5115', '6731', '6693']

Ex Output:
39812


Ex Input:
['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']

Ex Output:
21197


Ex Input:
['4443', '6893', 't', 'C', 'h', 'A', '1795', 'D', 'c', 'D', 'p', '6685', 'I']

Ex Output:

19816