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', 'j', 'p', 'j', '1737', '4349', 'u', 'f', '1765', '3697', 'I', 'q', '571']

25, 10, 16, 10, 1737, 4349, 21, 6, 1765, 3697, 9, 17, 571