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: ['4919', '3831', '223', 's', 'i', '233', 'y', '6613', '7147', '6725', '7839', '8167', 'r', '2113', '8305', 'g', '2985', '9275', '7591', 'd', '4399', 'X', '4615', 'n', 'Q', 'f', '1763', 'B', 'z', 'i', 'I']

4919, 3831, 223, 19, 9, 233, 25, 6613, 7147, 6725, 7839, 8167, 18, 2113, 8305, 7, 2985, 9275, 7591, 4, 4399, 24, 4615, 14, 17, 6, 1763, 2, 26, 9, 9