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: ['2551', '5009', 'I', 'u', 'A', '2023', 'O', '4859', 'm', 'e', '8959', '7679', 'x', '13', 'h', '545', '8901', 'g', 'W', 'e', 'N', '4465', 'l', '6061', 'H', '6207', 'D', '811', '8977', 'l', 'M', 'k', '5065']

2551, 5009, 9, 21, 1, 2023, 15, 4859, 13, 5, 8959, 7679, 24, 13, 8, 545, 8901, 7, 23, 5, 14, 4465, 12, 6061, 8, 6207, 4, 811, 8977, 12, 13, 11, 5065