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:
['t', 'G', '217', 'W', 'l', 'j', 'd', 'U', '6795', '1609', 'n', '6919', '617', '5753']

Ex Output:
21910


Ex Input:
['o', 'J', 'B', '7765', '7781', '5513', '8721', 'u', '9557', 'C', 'A', '1281', '6565', 'H', '5559', '1695', '7577']

Ex Output:
62014


Ex Input:
['j', 'M', '1217', 'L', '5059', 'i', 'X', 'R', '2287', 'N', '9797', '7831']

Ex Output:

26191