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: ['F', 'D', 'G', '1705', '4925', '411', '6607', '1003', 'x', 'E', 'u', 'u', 'V', 'V', '7837']

6, 4, 7, 1705, 4925, 411, 6607, 1003, 24, 5, 21, 21, 22, 22, 7837