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: ['b', 'U', '5179', '3589', '6193', 'p', '79', 'o', '5907', '149', 'k', 'N', 'f', '1891', '2245', '9063', '8269', 'P', 'W', 'V', 'T', '485', 'o', 'S', '2457', '2309', '6533', 'O', 'a', 'v', '7661', '2609', '8655', '8677', '3809', '2689', 'M']

2, 21, 5179, 3589, 6193, 16, 79, 15, 5907, 149, 11, 14, 6, 1891, 2245, 9063, 8269, 16, 23, 22, 20, 485, 15, 19, 2457, 2309, 6533, 15, 1, 22, 7661, 2609, 8655, 8677, 3809, 2689, 13