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: ['9359', 'k', 'E', '5113', '4717', '2973', 'O', '6277', '4945', '141', 'k', '6313', '2549', '3125', '8303', 'T', 'M', '8365', '5667', '6529']

9359, 11, 5, 5113, 4717, 2973, 15, 6277, 4945, 141, 11, 6313, 2549, 3125, 8303, 20, 13, 8365, 5667, 6529