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: ['3179', '3075', '9335', '7881', '2675', '8049', '9189', 'u', '7959', '7583', 'Y', 'J', 'W', '2971', 'U', 'R', 'b', '6619', '1993', '8555', 'Z', '8957', '2599', '7939', '7409', 'n', 'X', '9117', '9969', 'o', 'A', '9403', '49']

3179, 3075, 9335, 7881, 2675, 8049, 9189, 21, 7959, 7583, 25, 10, 23, 2971, 21, 18, 2, 6619, 1993, 8555, 26, 8957, 2599, 7939, 7409, 14, 24, 9117, 9969, 15, 1, 9403, 49