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: ['e', 'M', 'Y', 'C', 'G', 'R', 's', '2323', 'H', 'x', 'h', 'D', '6907', '277', '4335', 'S', '5725', 'G', 'n', 'g', '1439', '2963', '5921', '2281', 'E', '639', 'A', '549', '1505', 'Z', 'r', 'o', '9563', '6597', '1717']

5, 13, 25, 3, 7, 18, 19, 2323, 8, 24, 8, 4, 6907, 277, 4335, 19, 5725, 7, 14, 7, 1439, 2963, 5921, 2281, 5, 639, 1, 549, 1505, 26, 18, 15, 9563, 6597, 1717