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: ['3869', '5187', 'm', 'Z', '8285', 'A', 'c', '7195', 'J', '4089', '4303', 'U', '5327', '9395', '7525', '5589', 'P', '8303', '9741', '7733', 'O', 'l', 'w', 'z', 'q', 'H', '9763', '2215', 'M', '9907', '843', 'N']

3869, 5187, 13, 26, 8285, 1, 3, 7195, 10, 4089, 4303, 21, 5327, 9395, 7525, 5589, 16, 8303, 9741, 7733, 15, 12, 23, 26, 17, 8, 9763, 2215, 13, 9907, 843, 14