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: ['y', 'h', 'M', 'Q', 'H', '6989', 'Y', 'o', 's']

25, 8, 13, 17, 8, 6989, 25, 15, 19