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: ['8717', '4597', 'W', '9247', '4697', '1585', 'S', '4757', '4065', 'T', '2803', 'm', 'W', 'Z', 'o', '4773', 'p', 'R', 'b', '1513', '2653', 'q', 'G', '1599', 'G', '2695', '6201', 'L', '7893', '3509', '2887', '5259', 'v', '6693', '2111', 'O', 'R', '3385']

8717, 4597, 23, 9247, 4697, 1585, 19, 4757, 4065, 20, 2803, 13, 23, 26, 15, 4773, 16, 18, 2, 1513, 2653, 17, 7, 1599, 7, 2695, 6201, 12, 7893, 3509, 2887, 5259, 22, 6693, 2111, 15, 18, 3385