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: ['C', 'W', 'W', 'H', 'X', 'j', '2917', 'l', 'm', 'Z', 'Q', 'O', '3997', '5793', 'b', 'w', 'G', 'X', 'b', '9557', 'w', '8703', 'm', '7815', '8425', '2231']

3, 23, 23, 8, 24, 10, 2917, 12, 13, 26, 17, 15, 3997, 5793, 2, 23, 7, 24, 2, 9557, 23, 8703, 13, 7815, 8425, 2231