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: ['9239', '4393', 't', '2733', '675', '3009', '4413', 'j', '4975', '6473', '5121', 'E', 'J', '2799', 'W', '8193', '3911', '4383', '605', 'j', '2117']

9239, 4393, 20, 2733, 675, 3009, 4413, 10, 4975, 6473, 5121, 5, 10, 2799, 23, 8193, 3911, 4383, 605, 10, 2117