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: ['9481', '2227', 'a', 'B', '6929', 'Y', '4119']

9481, 2227, 1, 2, 6929, 25, 4119