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: ['9975', 'd', 'R', 'h', 'b', '9359', 'V', '2285', '5133', '6483', 'v', '515', 'x', 'V', 'e', 'L', 'k', '4561', '1143', 'y', 'q', '6865', '227', '8465', 'J', 'P', 'y', 'V', '7001', '9339', 'B', 'R', 't', 'j', '2465', 'R', '8021', '4207', '5249']

9975, 4, 18, 8, 2, 9359, 22, 2285, 5133, 6483, 22, 515, 24, 22, 5, 12, 11, 4561, 1143, 25, 17, 6865, 227, 8465, 10, 16, 25, 22, 7001, 9339, 2, 18, 20, 10, 2465, 18, 8021, 4207, 5249