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: ['y', '7717', 'Z', '317', '4963', 'T', 'J', 'C', 'd', '5335']

25, 7717, 26, 317, 4963, 20, 10, 3, 4, 5335