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: ['8573', 'D', 'e', '2589', '4689', '2861', 'X', '1619', 'X', '7655', 'v', 'A', 'E', 'b', 'z', '495', '9493', '7207', 'p', '6683', '73', '5421', '1475', '5215', 'w', '8591', '6055', 'J', '3207', '5679', 'S', '185', 'l']

8573, 4, 5, 2589, 4689, 2861, 24, 1619, 24, 7655, 22, 1, 5, 2, 26, 495, 9493, 7207, 16, 6683, 73, 5421, 1475, 5215, 23, 8591, 6055, 10, 3207, 5679, 19, 185, 12