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:
['f', 'F', 'E', '2279', 'r', '6419', 'd', 'M', '3975', '3797', '9201', 'F', 'c', '4753', '959', 'v', '8963', '4007']

Ex Output:
44353


Ex Input:
['z', 'j', 'M', 'E', '1689', '8413', '2603', 'b', '5101', 'w', 'r']

Ex Output:
17806


Ex Input:
['s', '1869', '5665', '3413', 'K', 'I', '9469', 'k', '9051', '3327', '9521', '6481', 'j', 'B', 'l', '2825', '421', '7717', 'S', '4381']

Ex Output:

64140