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:
['o', '8089', '2159', '943', '1255', 'w', 'Y', '3723', 'n', '7767', '2209', 'F', 'c', 'J', '5259', '4427', 'n', 'U']

Ex Output:
35831


Ex Input:
['2625', '1611', 'E', '4507', '3013', '1569', 'M', '2607', '1111', 'W']

Ex Output:
17043


Ex Input:
['6075', 'W', '3659', '4449', '1637', '8123', 'F', '9031', '1341']

Ex Output:

34315