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:
['v', '3135', 'J', 'm', 'a']

Ex Output:
3135


Ex Input:
['M', 'F', '4477', '1565', '4407', 'r', 'v', '7237', '83', '5243', 'O', 'z', 'W', '7703', 'Q', 'i', '9657', 'n']

Ex Output:
40372


Ex Input:
['3565', 'M', 'i', '6283', '7107', '8053', 'u', '7911', '5709', '8417', 'C', '1521', '3561', '9801', '6431', 'c', '1301']

Ex Output:

69660