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: ['5459', '1905', 'y', '1429', 'T', '7381', '5423', '8397', '9309', 'm', 'J', 'y', '9343', 'Q', 'e', 's', 'B', '9115', '9369', '2157', 'u', '2887', 'y', 'f', 'P', '181', '1967', '9223']

5459, 1905, 25, 1429, 20, 7381, 5423, 8397, 9309, 13, 10, 25, 9343, 17, 5, 19, 2, 9115, 9369, 2157, 21, 2887, 25, 6, 16, 181, 1967, 9223