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: ['q', 'D', 'w', '399', 'Q', '4043', '5281', '5489', 'r', 'C', 'Y', '6343', 'E', 'Q', '6309', 'M', 'l', '6865', '2969', 'j', '3803', 'P', '7705', '6225', 'p', 'o', '8725', 'a', 'e']

17, 4, 23, 399, 17, 4043, 5281, 5489, 18, 3, 25, 6343, 5, 17, 6309, 13, 12, 6865, 2969, 10, 3803, 16, 7705, 6225, 16, 15, 8725, 1, 5