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: ['3113', 'Q', '3295', 'i', '3581', '2183', 'i', '5893', 'D', 'H']

3113, 17, 3295, 9, 3581, 2183, 9, 5893, 4, 8