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.

Input: Consider Input: ['X', '989', 'U', '9551', '6385', 'Y', '1433', 'J', '1833', '685', 'u']

Output: 20876


Input: Consider Input: ['i', 'C', '5373', '2017', 'm', '5435', 'Y', 'h']

Output: 12825


Input: Consider Input: ['D', '1211', '2019', '1107', '7381', '2363', 'Y', 'd', 'Q', '5763', 'm', '7599', '8335', 'u', '487', '897', '4805', 'V', '4733', '7713']


Output: 54413