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: ['m', '4275', '3631', 'B', '6165', '1777', '65', '6935', '3981', 'r', 'O', '2267', 'y', '5513', '2991', '7789', '8663', 'P', '8083', '2361', '7393', 'D', '2853', 'K', '9095', '3487', 'P', 'H', 'n', '6931', '5841', 'X', 'O', '2527', 'N', 's']

13, 4275, 3631, 2, 6165, 1777, 65, 6935, 3981, 18, 15, 2267, 25, 5513, 2991, 7789, 8663, 16, 8083, 2361, 7393, 4, 2853, 11, 9095, 3487, 16, 8, 14, 6931, 5841, 24, 15, 2527, 14, 19