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: ['m', 'I', '2885', '9887', 'y', 'M', '7501', 'Q', 'S', '1789', 'N', '8835', 'R', 'X', 'I', 'e', 'Y', '4967', '1511', 'J', '7891', '6147', 'c', '1735', 'L', '4229']

13, 9, 2885, 9887, 25, 13, 7501, 17, 19, 1789, 14, 8835, 18, 24, 9, 5, 25, 4967, 1511, 10, 7891, 6147, 3, 1735, 12, 4229