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: ['d', '2461', 'w', '5209', '2699', 'x', '5811', '3549', '8929', '3821', 'E', 'K', '7645', '1889', 'T', 'v', 'l', '8163', 'J', '633', '8459', '5125', '4095', 'Y', 'n', 'B', 'h', '8395', '4187', 'x', 'g', '9287', 'T', 'm', 'W', '1987', 'M', '2879', 'C']

4, 2461, 23, 5209, 2699, 24, 5811, 3549, 8929, 3821, 5, 11, 7645, 1889, 20, 22, 12, 8163, 10, 633, 8459, 5125, 4095, 25, 14, 2, 8, 8395, 4187, 24, 7, 9287, 20, 13, 23, 1987, 13, 2879, 3