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: ['S', 'W', '2171', '6405', 'h', 'C', '1597', '7109', 'Q', 'p', '2747', 't', 'J', 'q', '1883', 'v', 'O']

Output: 21912


Input: Consider Input: ['m', '6153', 'A', '6173', 'x', '7527', '8501', 'g', 'r', 'K', 'I', '3103', '8347']

Output: 39804


Input: Consider Input: ['1711', '8165', 'm', 'X', 'H', 'O', 'A', 'k', '1821', 't', 'N', 'v', '5925', 'V', 'r', 'G']


Output: 17622