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: ['Q', 'o', '8063', 'R', 'T', '8241', '1457', 'u']

17, 15, 8063, 18, 20, 8241, 1457, 21