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: ['3469', 'Z', 'n', 'L', 'q', '3197', '757', 'y']

3469, 26, 14, 12, 17, 3197, 757, 25