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', '4493', 'y', '513', '41', '5957', '5081', 'R', '2589', '7223', '3943', '4193', '4685', 'J', 'K', 'm', '4309', '8701', 'Z', 'X', '1025', '7999', '8567', 'L']

25, 4493, 25, 513, 41, 5957, 5081, 18, 2589, 7223, 3943, 4193, 4685, 10, 11, 13, 4309, 8701, 26, 24, 1025, 7999, 8567, 12