Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['k', '3183', 'W', '299', 'C', '4085', 'N', '2541', '8681', '4243', 'R', '6589', '579']

11, 3183, 23, 299, 3, 4085, 14, 2541, 8681, 4243, 18, 6589, 579