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: ['5229', '7303', 'A', 'G', '541', 'K', 'b', 'Q', '417', '8229', '3755', '8725', '2421', '2963', '2535', 'D', 'g', 'k', '8507']

5229, 7303, 1, 7, 541, 11, 2, 17, 417, 8229, 3755, 8725, 2421, 2963, 2535, 4, 7, 11, 8507