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: ['9965', '5163', 'I', '7013', 'l', 'q', 'Z', 'C', 'C', 'F', '4509', '5417', 'i', 'u', 'O', '9731', '6227', 'z', '5137', 'q', '4947', 'a', '8925', 'G', '87', 'E', 'o', '3381']

9965, 5163, 9, 7013, 12, 17, 26, 3, 3, 6, 4509, 5417, 9, 21, 15, 9731, 6227, 26, 5137, 17, 4947, 1, 8925, 7, 87, 5, 15, 3381