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: ['4771', '3245', '803', 'm', 'B', 'z', 'G', 'o', 'L', '4579', 'T', 'j']

4771, 3245, 803, 13, 2, 26, 7, 15, 12, 4579, 20, 10