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: ['D', '8813', '8343', 't', 'b', 'r', 'w', '8605', '6399', '6699', 'e', '9835', 'J', 'p', '8537', '5187', '4793', '3091', 'x', 'T', '1643', 'r', 'h', 'G', 'R']

4, 8813, 8343, 20, 2, 18, 23, 8605, 6399, 6699, 5, 9835, 10, 16, 8537, 5187, 4793, 3091, 24, 20, 1643, 18, 8, 7, 18