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: ['5623', 'B', 'o', '5715', '3055', '9403', '2027', '6545']

5623, 2, 15, 5715, 3055, 9403, 2027, 6545