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: ['C', '9973', 'b', '693', 'y', 'H', 'C', 'P', 'b', 'J', 'f', 'T', '2317', 'O', '5755', '8201', 'p', 'y', '8721', 'i']

Output: 35660


Input: Consider Input: ['W', '4453', '5895', 'Z', 'A', '7663', '2749', 'f', 'H', '6917', '1215', 'M', '1775', '5397', 'l', '8197', '5209', '8229', 'U']

Output: 57699


Input: Consider Input: ['k', 'k', 'd', 'F', '6283', '6835', '4459', '3815', '2877', '7389', '6041', 'P', 'q', 'S', 'k', 'u', '223']


Output: 37922