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: ['J', 'h', '1475', '2415', 'V', '4525', 'i', 'M', '8859', '8597', '6589', '8773', '1875']

10, 8, 1475, 2415, 22, 4525, 9, 13, 8859, 8597, 6589, 8773, 1875