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: ['o', '585', 'c', '1269', '6931', '1453', '6413', '8829', '6033', 'X', 'D', '7723', '1991', '1915', 'I', 'B', 'c', 'K', '4407', 'o', 'w', '6045', 'K', 'b', '3489', 'J', '429', '9935', 's', 'M', '1675', '7773', 'a']

15, 585, 3, 1269, 6931, 1453, 6413, 8829, 6033, 24, 4, 7723, 1991, 1915, 9, 2, 3, 11, 4407, 15, 23, 6045, 11, 2, 3489, 10, 429, 9935, 19, 13, 1675, 7773, 1