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: ['X', '8283', '1493', 'a', 'o', 'r', '37', '4347', 'd', 'P', 'Y', 'P', 'l', '7057', '9005', 'O', '4649', '8449', '7637', 'y', '2639', 'q', '4881', 'b', 'j', '749', '9473', 'j', '71']

24, 8283, 1493, 1, 15, 18, 37, 4347, 4, 16, 25, 16, 12, 7057, 9005, 15, 4649, 8449, 7637, 25, 2639, 17, 4881, 2, 10, 749, 9473, 10, 71