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: ['y', 'q', 'B', 'B', '3381', 'o', '8887', 'J', '3071', 'Q', 'Y', 'J', '4935', '777']

25, 17, 2, 2, 3381, 15, 8887, 10, 3071, 17, 25, 10, 4935, 777