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: ['3273', 'I', 'j', 'X', 's', '141', '9467', 'B', '5657', 'J', '4745', 'O', 'u', '4465', 'T', 'y', 'T', '6377', '7463', 'D', '921', '5207', '917']

3273, 9, 10, 24, 19, 141, 9467, 2, 5657, 10, 4745, 15, 21, 4465, 20, 25, 20, 6377, 7463, 4, 921, 5207, 917