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: ['8221', 'k', '5985', 'L', '7397', 'W', 'B', 'O', '8557', 'o', 'Q', 'K', '563', '6369', '1977', 's', 'Y', '4967', '5941', '2243']

8221, 11, 5985, 12, 7397, 23, 2, 15, 8557, 15, 17, 11, 563, 6369, 1977, 19, 25, 4967, 5941, 2243