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: ['5873', '5849', '1303', '1455', '1751', 'R', 'F', 'V', 'B', 'w', '9767', '8655', '7239', '5543', 'M', '7383', '9757', 'U', '5095', 'Y', 'w', '7775', '3503', '5513', '5785', '9267', 'j', 'y', 'i', '7263', '4735']

5873, 5849, 1303, 1455, 1751, 18, 6, 22, 2, 23, 9767, 8655, 7239, 5543, 13, 7383, 9757, 21, 5095, 25, 23, 7775, 3503, 5513, 5785, 9267, 10, 25, 9, 7263, 4735