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: ['2383', '2355', 'M', '3337', '7023', '7145', 'l', 'V', 'Y']

2383, 2355, 13, 3337, 7023, 7145, 12, 22, 25