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: ['S', 'L', 'W', '4217', '3285', '7945', 'q', 'H', 'G', 'K', '9475', 'K', '7215', '2605', 'r', '1327', 'x', '8843', '8585', 'p', 'b', '6213', '2739', 'y', 't', '7763', 'p', 'w', 'q', 'X', 'K', '8259', '7297', '8071', 'a']

19, 12, 23, 4217, 3285, 7945, 17, 8, 7, 11, 9475, 11, 7215, 2605, 18, 1327, 24, 8843, 8585, 16, 2, 6213, 2739, 25, 20, 7763, 16, 23, 17, 24, 11, 8259, 7297, 8071, 1