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: ['i', 's', '8223', 'K', 'W', '779', '3295', 'M', 'C', 'V', '2991', 'E', '5361', 'L', '333', 'D', 'Q', '1419', 'A', 'D', '3129', '5515', '9011', '8835', '1375', 'x', 'Y', '2079', '5549', '6859', '961', '7457', 'G', 'U', 'h', 'O', '6121']

9, 19, 8223, 11, 23, 779, 3295, 13, 3, 22, 2991, 5, 5361, 12, 333, 4, 17, 1419, 1, 4, 3129, 5515, 9011, 8835, 1375, 24, 25, 2079, 5549, 6859, 961, 7457, 7, 21, 8, 15, 6121