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', 'Z', '5299', 's', '65', 'O', 't', '869', '7981', '5045', 'K', '9597', '9229', 'U', '5251', '9495', 'n', '4001', '4075', 'W', 'B', '7587', '5785', 'E', 'B', 'C', '1547', 's', 'o', 'b', 'F', '7651', 'a', 'K', 'N', 'i']

5, 26, 5299, 19, 65, 15, 20, 869, 7981, 5045, 11, 9597, 9229, 21, 5251, 9495, 14, 4001, 4075, 23, 2, 7587, 5785, 5, 2, 3, 1547, 19, 15, 2, 6, 7651, 1, 11, 14, 9