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: ['n', 'R', 'u', '1675', 'y', 'n', 'X', '4625', 'T', 'y', 'q', 'x', 'r', '4823', '7209', 'W', 'z', '3631', '269', '8121', 'Y', '2157', '9109', '4303', 'y', 'q', 'E', 'i', 'y', 't', '7061', 'm', 'q', '839', '1193', '8381', '2461', '7947', '5673', 's']

14, 18, 21, 1675, 25, 14, 24, 4625, 20, 25, 17, 24, 18, 4823, 7209, 23, 26, 3631, 269, 8121, 25, 2157, 9109, 4303, 25, 17, 5, 9, 25, 20, 7061, 13, 17, 839, 1193, 8381, 2461, 7947, 5673, 19