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: ['3099', 'x', 'k', '8745', '2941', '5155', '9611', 'p', '7303', '3487', 'I', 'e', '2293', 'q', 'N', 'a', '499', 'h', '9185', 'U', '7235', 'P', '8817', 'y', 'V', 'k', '129', 'E']

3099, 24, 11, 8745, 2941, 5155, 9611, 16, 7303, 3487, 9, 5, 2293, 17, 14, 1, 499, 8, 9185, 21, 7235, 16, 8817, 25, 22, 11, 129, 5