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: ['8689', 'C', 'O', '5333', '8891', 'k', 'D', 'H', 'c', 'R', 'x', '993', '7153', 'N', 'T', 'N', '7673', '9317', '2571', '7471', 'Z', '2851', 's', '5215', 'W', '4805']

8689, 3, 15, 5333, 8891, 11, 4, 8, 3, 18, 24, 993, 7153, 14, 20, 14, 7673, 9317, 2571, 7471, 26, 2851, 19, 5215, 23, 4805