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: ['3297', '7333', 'a', '491', '6453', '693', '6391', 'B', '3349', 'e', '7623', '8263', '8889', '8429', 'e', '385', '7617', '5265', 'k', '3563', 'E', 't', 'P', '353', '8681', 'W', '5723', '603', '8311', 'l', 'S', '2895', 'z', '411']

3297, 7333, 1, 491, 6453, 693, 6391, 2, 3349, 5, 7623, 8263, 8889, 8429, 5, 385, 7617, 5265, 11, 3563, 5, 20, 16, 353, 8681, 23, 5723, 603, 8311, 12, 19, 2895, 26, 411