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: ['3651', 'n', '5539', '5095', '3455', '1375', '6277', '8273', 'e', 'p', 'i', 'p', '4571', '691', '1643', '9259', '7289', 'v', '8909', 'b', '4797', 'u', '9395', 'u', '8897', '5337']

3651, 14, 5539, 5095, 3455, 1375, 6277, 8273, 5, 16, 9, 16, 4571, 691, 1643, 9259, 7289, 22, 8909, 2, 4797, 21, 9395, 21, 8897, 5337