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: ['9033', '6501', 'R', '8887', '7211', 'r', '6977', 'n', 'f', 'z', '4629', '8773', '6613', '3989', 'G', '4051', '9485', 'K', 'p']

9033, 6501, 18, 8887, 7211, 18, 6977, 14, 6, 26, 4629, 8773, 6613, 3989, 7, 4051, 9485, 11, 16