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: ['k', '8669', 'e', '9485', '421', '4975', 'T', 'z', 'I', 'l', 'Z', '5681', '9101', 'X', 'T', 'n', '3029', 'L', '5575', 'V', 'e', '3099', '9807', '6247', 'B', 'o', '945', 'u', 'O', 'j']

11, 8669, 5, 9485, 421, 4975, 20, 26, 9, 12, 26, 5681, 9101, 24, 20, 14, 3029, 12, 5575, 22, 5, 3099, 9807, 6247, 2, 15, 945, 21, 15, 10