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: ['8201', 'D', '459', '4771', 'x', 'W', '4505', 'C', 'h', '53', 'm', '6015', '4041', '9655', '7247', 'Q', 'H', '587', '3111', 'L', 'o', '2397', 'V', 'C', '1849', 'u', 'q', '8137']

8201, 4, 459, 4771, 24, 23, 4505, 3, 8, 53, 13, 6015, 4041, 9655, 7247, 17, 8, 587, 3111, 12, 15, 2397, 22, 3, 1849, 21, 17, 8137