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: ['9275', 'V', '473', 'j', '5145', '1415', 'K', 'A', 's', 'q', '2709', 'X', '2469', 'l', 'b', 'i', 'h', '3159', '9283', 'k', '253', 'c', 'g', 'p', 'o', 'y', 'U', '9815', '9593', '2549', 'n']

9275, 22, 473, 10, 5145, 1415, 11, 1, 19, 17, 2709, 24, 2469, 12, 2, 9, 8, 3159, 9283, 11, 253, 3, 7, 16, 15, 25, 21, 9815, 9593, 2549, 14