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: ['s', 'T', '5929', 'j', '4127', '5725', '9853', 'J']

19, 20, 5929, 10, 4127, 5725, 9853, 10