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:
['D', 'b', 'h', 'p', '1637']

Ex Output:
1637


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:
['7265', '1085', '2299', 'M', '3569', 'N', 'e', 'z', 'u', '2745', 'o', 'I', '947', 'E', 'A', 'N', '6425']

Ex Output:

24335