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: ['2493', '129', '5811', '6665', 'S', '1303', 'x', '2239', '7707', '4061', 'f', 'D', '1437', 'K', 'u', 'm', 'k', 'Q', '1189', '5309', 'T', 'g', 'T', '9725', '425', 'u', 'T', '4967', '2095', '2829']

2493, 129, 5811, 6665, 19, 1303, 24, 2239, 7707, 4061, 6, 4, 1437, 11, 21, 13, 11, 17, 1189, 5309, 20, 7, 20, 9725, 425, 21, 20, 4967, 2095, 2829