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: ['7239', 'p', '4153', 'D', 'V', '1191', '7971', 'n', 'G', '9099', '5289', '447', 'J', 'b', '9211', 'E', 'Y', 'R', 'k', '1495', '6115', '7097', '3497', '453', 'S', 'z', 'G', 'm', 'J', 'a', '8631', 'Y', '179', 'E', '3275', 'M', '6229', '8841']

7239, 16, 4153, 4, 22, 1191, 7971, 14, 7, 9099, 5289, 447, 10, 2, 9211, 5, 25, 18, 11, 1495, 6115, 7097, 3497, 453, 19, 26, 7, 13, 10, 1, 8631, 25, 179, 5, 3275, 13, 6229, 8841