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:
['X', 'P', 'x', '9471', '5', 'c', 'f', '5077', '1085', '2267', 'R', 'q', '4987', '9529', 'H', 'n', 'r', 'u']

Ex Output:
32421


Ex Input:
['3565', 'z', '8811', 'z', 'U', '113', 'I', '1307', '135', 'V', 'P', '5183', '2505', '4863', '1113', 'A', '7575', '827', 'B']

Ex Output:
35997


Ex Input:
['Z', '4053', '7321', '6247', 'P', 'X', '145', '5241', 'T', '2003', 'm']

Ex Output:

25010