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: ['9573', '5929', 'I', '1359', 'w', 'u', 'Y', '9927', '7465']

9573, 5929, 9, 1359, 23, 21, 25, 9927, 7465