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: ['8579', '6883', 'p', '5999', '979', 'O', 'j', 'O', 'T', 'N', 'F', '5057', 'E', 'R', 'L', '2153', 'q', 'E', '8681', '1181', 'y', '8829', 'E', 'a', 'C', 'g']

8579, 6883, 16, 5999, 979, 15, 10, 15, 20, 14, 6, 5057, 5, 18, 12, 2153, 17, 5, 8681, 1181, 25, 8829, 5, 1, 3, 7