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: ['5223', 'e', 'o', 'i', 'd', 'Z', 'i', 'M', 'I', 'n', 'v', '2537', '9003', 'h', '915', '8707', '8515', '9049', 'G', 'X', 'I', '6597', '6315', '9557', '6209', 'W', '9283', 'H', '7167', '8375', 'D', 'a', '619', 'v', 'i']

5223, 5, 15, 9, 4, 26, 9, 13, 9, 14, 22, 2537, 9003, 8, 915, 8707, 8515, 9049, 7, 24, 9, 6597, 6315, 9557, 6209, 23, 9283, 8, 7167, 8375, 4, 1, 619, 22, 9