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: ['4845', '1435', '4531', '9191', '1547', '4577', 'r', '6015', '6813', 'q', '6693', 'D']

4845, 1435, 4531, 9191, 1547, 4577, 18, 6015, 6813, 17, 6693, 4