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: ['D', '5553', 'k', '1081', 'Q', '1383', '2019', 'y', '695', 'H', '3831', '3639', 'n', '9659', '6935', 's', '3203', 'x', 'm', 'H', '8369', 'n', '13', '8535', 'h', '5185', '2499', '2007', 'b']

4, 5553, 11, 1081, 17, 1383, 2019, 25, 695, 8, 3831, 3639, 14, 9659, 6935, 19, 3203, 24, 13, 8, 8369, 14, 13, 8535, 8, 5185, 2499, 2007, 2