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: ['5829', '8823', 'O', 'c', '2743', '4149', '1123', 'r', '4047', 'y', 'c', '8383', '5567', 'f', '9945', '9237', '1089', '819', 'R', 'a', 'F', 'o', '9147']

5829, 8823, 15, 3, 2743, 4149, 1123, 18, 4047, 25, 3, 8383, 5567, 6, 9945, 9237, 1089, 819, 18, 1, 6, 15, 9147