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: ['P', '9673', 'l', 'b', 'm', 'K', 'J', 'r', 'L', '2241', 'l', 'H', '7757', '881', '6693', '8939', 'p', '9585', 't', '7359', '7541', '3423', 'u', 'I', 'X', 'e', 'Y', 'Y', '4295', 'c', 'H', '4353', '9807', '5561', 's', '833', '4617', '2325', 'o', '9211']

16, 9673, 12, 2, 13, 11, 10, 18, 12, 2241, 12, 8, 7757, 881, 6693, 8939, 16, 9585, 20, 7359, 7541, 3423, 21, 9, 24, 5, 25, 25, 4295, 3, 8, 4353, 9807, 5561, 19, 833, 4617, 2325, 15, 9211