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: ['o', 'x', 'E', 'H', '5407', '6813', 'R', 'w', 'g', '9289', '3583', '3055', 'w', '9099', 'F', '9709', 'p', 'p', 'o', '9237', 'o', '9881', 'f', 'q', '2617', 's', '7601', 'l', '4799', '1083', '7221', '9959', 'q', '3493', '4793', 'm', 'N', 'Z', 'E', 'o']

15, 24, 5, 8, 5407, 6813, 18, 23, 7, 9289, 3583, 3055, 23, 9099, 6, 9709, 16, 16, 15, 9237, 15, 9881, 6, 17, 2617, 19, 7601, 12, 4799, 1083, 7221, 9959, 17, 3493, 4793, 13, 14, 26, 5, 15