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: ['5815', '5375', '4475', '3605', '9997', 'e', 'G', '8333', '2543', '8485', '5195', 'i', '5713', '5905', 'A', '1905', '3169', '9133', '153']

5815, 5375, 4475, 3605, 9997, 5, 7, 8333, 2543, 8485, 5195, 9, 5713, 5905, 1, 1905, 3169, 9133, 153