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: ['4161', '4171', '9773', '2571', '3403', '3475', 'e', '8013', 'i', 'P', '6977', '679', '5019', '8237', 'X', 'A', '6225', 'T']

4161, 4171, 9773, 2571, 3403, 3475, 5, 8013, 9, 16, 6977, 679, 5019, 8237, 24, 1, 6225, 20