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: ['Q', '3189', 'P', 'A', '6861', 'D', 'l', 'y', '8061', 'C', 'a', '2655', '4931', 't', '2421', '7827', 'p', 's', '5305', 'C', '8231', 'O', 'q', '361', '1003', '8329', '3725', '2953', 'R', '225', '6797', 'c', 'E', '5209', 'p', 'Q']

17, 3189, 16, 1, 6861, 4, 12, 25, 8061, 3, 1, 2655, 4931, 20, 2421, 7827, 16, 19, 5305, 3, 8231, 15, 17, 361, 1003, 8329, 3725, 2953, 18, 225, 6797, 3, 5, 5209, 16, 17