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: ['d', '4277', '963', 'r', '8817', '9003', 'C', '6219', '117', '7993', 'l', '7009', 'v', 'a', '6123', 'C', '8617', '4425', 'h', '8907', '7945', '6543', '1133', '2899', 'l', '451', 'd', 'Z', 'x', '6591', 'Y']

4, 4277, 963, 18, 8817, 9003, 3, 6219, 117, 7993, 12, 7009, 22, 1, 6123, 3, 8617, 4425, 8, 8907, 7945, 6543, 1133, 2899, 12, 451, 4, 26, 24, 6591, 25