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: ['x', '4391', '8815', '1079', '2101', '3823', 'P', '5669', '1047', 'c', 's', 'q', 'W', 'g', 'T', '7667', '9183', '19', 'W', '7773', '1761', '5811', '2423', '8999', '6921']

24, 4391, 8815, 1079, 2101, 3823, 16, 5669, 1047, 3, 19, 17, 23, 7, 20, 7667, 9183, 19, 23, 7773, 1761, 5811, 2423, 8999, 6921