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: ['9381', 'f', '9595', 'U', '4857', '5865', '8259', 'Y', 'g']

9381, 6, 9595, 21, 4857, 5865, 8259, 25, 7