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: ['8133', '8199', 'L', 'o', 'g', '7417', 'W', '4621', '2825', 'P', '8439', '3755', '7959', 'k', 'c', '2727', '649']

8133, 8199, 12, 15, 7, 7417, 23, 4621, 2825, 16, 8439, 3755, 7959, 11, 3, 2727, 649