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: ['8193', '2455', 'T', '3511', 'n', 'U', 'd', 'E', 'X', 'V', 'o', 'U', '2013', '6935', 'M', 'B', '4899', 'L', 'X', 'd', 'X', '6431', 'z', '7883', 's', 'r', '9389', 'j']

8193, 2455, 20, 3511, 14, 21, 4, 5, 24, 22, 15, 21, 2013, 6935, 13, 2, 4899, 12, 24, 4, 24, 6431, 26, 7883, 19, 18, 9389, 10