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: ['p', '5849', '6695', 'P', '1403', 'e', '9319', '3921', '1833', 'q', 'J']

16, 5849, 6695, 16, 1403, 5, 9319, 3921, 1833, 17, 10