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: ['z', 'B', 't', 'H', 'D', '2527', '8157', '4361', '1509', '8991', 'y', 't', '2181', 'i', '6433', 'D', 'G', '3353']

26, 2, 20, 8, 4, 2527, 8157, 4361, 1509, 8991, 25, 20, 2181, 9, 6433, 4, 7, 3353