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: ['3433', '6955', 'Q', 'E', '3557', 'S', '2931', '9879', 'S', 'f', 'Q']

Output: 26755


Input: Consider Input: ['z', 'U', '6817', 's', '3731', 'M', 'I', '1095', 'l', '5993', '5207', 'e', 'L', '5361', 'v', 'g', '1963', '4829', '9541', '8261']

Output: 52798


Input: Consider Input: ['z', '7129', 'L', '3013', '4315', 's', 'K', '9227', '5977', 'g', 'D', 'R', '4559', 'A', '9959']


Output: 44179