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: ['H', '9729', 'D', '4423', 'O', 'K', 't', '2477', 'w', 't', '9009', 'X', '4035', 'z', '4107']

8, 9729, 4, 4423, 15, 11, 20, 2477, 23, 20, 9009, 24, 4035, 26, 4107