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', '9835', 'l', 'L', 'h', '2825', 'k', 'u', '8087', '5403', 'a', 'Y', '7747', 'i', '1899', '8653', '7291', 'n', 'm', 'r', 'J', 'w', '4913', 'A', '3929', '35', 'Y']

14, 9835, 12, 12, 8, 2825, 11, 21, 8087, 5403, 1, 25, 7747, 9, 1899, 8653, 7291, 14, 13, 18, 10, 23, 4913, 1, 3929, 35, 25