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: ['8425', 'L', 'V', '3107', '9591', 'E', '7879', '1129', 'M', '3777', 'x', 'J', 'B', '5691', '5683', 'k', '7733', '4417', '1201', 'S', 'j', 'E', '9847', 'm', '5845', 'r', '9575', '7359', 't', 'F', 'v', '7607', 'S']

8425, 12, 22, 3107, 9591, 5, 7879, 1129, 13, 3777, 24, 10, 2, 5691, 5683, 11, 7733, 4417, 1201, 19, 10, 5, 9847, 13, 5845, 18, 9575, 7359, 20, 6, 22, 7607, 19