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:
['K', 'p', '97', 'R', '2999', 'u', '7307', '6033', '6431', 'm', 'T']

Ex Output:
22867


Ex Input:
['C', '9973', 'b', '693', 'y', 'H', 'C', 'P', 'b', 'J', 'f', 'T', '2317', 'O', '5755', '8201', 'p', 'y', '8721', 'i']

Ex Output:
35660


Ex Input:
['r', 'z', 'u', 'D', '3449', 'E', 'f', 'w', '1627', '4093', '955', 'i', 's', 'R', 'b', '9773', '2169', 'M', '9305', '4775']

Ex Output:

36146