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: ['8249', 'H', '3851', '7195', '9823', 'i', '1253', '9363', 's', '1369']

8249, 8, 3851, 7195, 9823, 9, 1253, 9363, 19, 1369