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: ['8371', 'C', '2189', 'h', '3743', 'H', '5141', 'v', '1039', 'U', '569', '4505', 'D', '6365', '1407', '6675', '197', 'k', 'V', 'C', 'm', 'l', 'v', '6831', 'W', '2467', '3043', 'x', 'I', 'M', 'L', 'l', '7395']

8371, 3, 2189, 8, 3743, 8, 5141, 22, 1039, 21, 569, 4505, 4, 6365, 1407, 6675, 197, 11, 22, 3, 13, 12, 22, 6831, 23, 2467, 3043, 24, 9, 13, 12, 12, 7395