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: ['M', 'o', '7789', 'Y', 'h', 'o', '9935', 'J', '9693', 'J', 'P']

13, 15, 7789, 25, 8, 15, 9935, 10, 9693, 10, 16