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: ['3413', '4665', '2153', '8219', '8355', 'D', '4185', 'n', '3321', '8425', 'Y', 'v', 'M', '2149', 'S', '8645', 'M', 'O', 'C', '1155', '3227', 'y', '9475', '7103', '4341', '2753', '8947', 'e', '3009', 's', 'b', '2817']

3413, 4665, 2153, 8219, 8355, 4, 4185, 14, 3321, 8425, 25, 22, 13, 2149, 19, 8645, 13, 15, 3, 1155, 3227, 25, 9475, 7103, 4341, 2753, 8947, 5, 3009, 19, 2, 2817