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: ['J', 'L', '1243', 'd', 'y', '9691', 'j', 'W', 'T', '4585', 'J', 'w', 'Q', '5423', '9335', 'x', '5483', 'n', 'V', '9421', 'm', 'l', 'f', 'z', 'x', '1487', 'i', 'e', 'F', 'p', 'F', 'x', '2673', '8215', '3097', '9303', 'k', '2777', '271', '5641']

10, 12, 1243, 4, 25, 9691, 10, 23, 20, 4585, 10, 23, 17, 5423, 9335, 24, 5483, 14, 22, 9421, 13, 12, 6, 26, 24, 1487, 9, 5, 6, 16, 6, 24, 2673, 8215, 3097, 9303, 11, 2777, 271, 5641