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: ['8285', 'J', '3683', '1667', 'L', 'F', '619']

8285, 10, 3683, 1667, 12, 6, 619