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: ['D', 'T', 'U', '4023', '7819', 'i', '7791', 'l', 'q', '895', '3025']

4, 20, 21, 4023, 7819, 9, 7791, 12, 17, 895, 3025