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: ['8553', '343', 'f', '2471', 'G', 'K', 'm', '3247', 'H', '4887', '6225', '2547', '3371', 'T', '1497', '83', '3753', '1579', 'A', '967', 'z', '1133', 'q', '9439', 'g', 'M', 'R', 'L', '5289', 'P', '93', 'z', '9681', '4719', '551', 'o', 'E', '9301', '9395']

8553, 343, 6, 2471, 7, 11, 13, 3247, 8, 4887, 6225, 2547, 3371, 20, 1497, 83, 3753, 1579, 1, 967, 26, 1133, 17, 9439, 7, 13, 18, 12, 5289, 16, 93, 26, 9681, 4719, 551, 15, 5, 9301, 9395