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: ['s', 'Z', '8289', 'E', 'b', '1047', 'y', 'E', 'O', '793', 'd', '9149', 'H', 'V', 'B', 'V', 'F', '2899', '9707', 'K', '2473', 'S']

19, 26, 8289, 5, 2, 1047, 25, 5, 15, 793, 4, 9149, 8, 22, 2, 22, 6, 2899, 9707, 11, 2473, 19