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: ['9683', '6465', '3357', '9637', 'r', '6793', '9233', '4543', 'c', '4829', '3433', 'X', 'J', 'C', '4585', 'd', 'C', 'g', '7347', 'N', 'a', 'D', 'f', 't', 'L']

9683, 6465, 3357, 9637, 18, 6793, 9233, 4543, 3, 4829, 3433, 24, 10, 3, 4585, 4, 3, 7, 7347, 14, 1, 4, 6, 20, 12