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: ['f', '3481', 'i', '615', 'C', '1471', 'X', '7845', 'C', '9621', 'w', 'g', '1159', 'K', '3729', '7673', 'Q', '2515', '1705', '395', '7445', '7775', 'P', '7225', 'S', 'y', 'L', 'a', '1805']

6, 3481, 9, 615, 3, 1471, 24, 7845, 3, 9621, 23, 7, 1159, 11, 3729, 7673, 17, 2515, 1705, 395, 7445, 7775, 16, 7225, 19, 25, 12, 1, 1805