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: ['4195', '1495', '1803', 'u', '3833', 'X', '4279', 'l', 'g']

4195, 1495, 1803, 21, 3833, 24, 4279, 12, 7