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: ['i', 'e', 'W', 'T', 'k', '777', 'e', 'P', '1791', 'v', 'T', '837', 'p', '8285']

9, 5, 23, 20, 11, 777, 5, 16, 1791, 22, 20, 837, 16, 8285