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: ['3857', 'h', 'J', 'f', '9859', 'X', '5595', 'T', 'Z', 'k', '7091', '6691', 'y', '155', 'y', '5731', '7931', '6783', 'j', '5473', '9065', '93']

3857, 8, 10, 6, 9859, 24, 5595, 20, 26, 11, 7091, 6691, 25, 155, 25, 5731, 7931, 6783, 10, 5473, 9065, 93