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: ['y', '2973', '313', '1915', '41', 'Z', 'T', 'Q', 'r', '6675', 'R', '2411', '629', 'x', 'G', 'e', 'M', 'Y', 'e', 'k', '8963', 'Q', 'e', 'c', 'f', '1147', 'x', '6241', 'l']

25, 2973, 313, 1915, 41, 26, 20, 17, 18, 6675, 18, 2411, 629, 24, 7, 5, 13, 25, 5, 11, 8963, 17, 5, 3, 6, 1147, 24, 6241, 12