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:
['s', '3607', 'p', 'P', '9285', 'J', 'l', '9863', '9823', '2817', 'g', '9751', '599', '2605', 'k', 'Y', 'O', 'U', '9649']

Ex Output:
57999


Ex Input:
['57', '9977', '2657', 'p', '9573', '7745', '4755', 'U']

Ex Output:
34764


Ex Input:
['s', 'z', '4291', 'i', 'k', 'y', '3439', '3239', '2213', '957']

Ex Output:

14139