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', '7483', 'y', 'q', 'r', 'L', '4103', 'j', '6623', '7271', '5829', '5551', 'W', 'R', '8885', 'h', 'O', '137', 'r', '2221', 'K', '3735', '395', 'k', '253', '4171', '6897', 'b', 's', '3697', 'J']

25, 7483, 25, 17, 18, 12, 4103, 10, 6623, 7271, 5829, 5551, 23, 18, 8885, 8, 15, 137, 18, 2221, 11, 3735, 395, 11, 253, 4171, 6897, 2, 19, 3697, 10