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: ['7425', '5359', 'm', '7777', '5351', 'y', '1773', '9185', '9567', 'K', '2739', 'Y', '9691', 'i', 'P', 'J', '9895', 'T', '4625', 'k', '9979', 'z', '419', '3997', 'p', 'E', '7887', '1329', 'Q']

7425, 5359, 13, 7777, 5351, 25, 1773, 9185, 9567, 11, 2739, 25, 9691, 9, 16, 10, 9895, 20, 4625, 11, 9979, 26, 419, 3997, 16, 5, 7887, 1329, 17