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', '3537', 'T', '3611', 'k', '4983', 'h', '4317', '8727', 'E', '6471', '8465', 'f', '5429', 'T', '2169', '2171', 'P', '6941', 'D']

Ex Output:
56821


Ex Input:
['i', 'A', 'a']

Ex Output:
0


Ex Input:
['n', '9205', 'H', '6775', '8113', '5579', '6865', 'R', 'S', '1531', 'r', '5789', '8435', 'q', 'm', '9177', '2955', 'c', '483']

Ex Output:

64907