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:
['R', 'k', '3355', 'Y', '6635', 'M', '4839', 'T', 'd', '495', 'g', 'E', 'g', 'F', 'S', '5377', 'g']

Ex Output:
20701


Ex Input:
['8743', 'Y', 'O', '8265', '1029', '5689', 'F', 'j', 'Z', 'i', 'S', '1285', '737']

Ex Output:
25748


Ex Input:
['Z', '9941', '8847', '5041', 'Y', 'v', '611', '1871', 'T', 'b', 'U', 'n', 'd', '7777', '9745', 'v', '8063', '8407', 'S', '4051']

Ex Output:

64354