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: ['4453', 'E', 'c', '7433', '9803', '6281', 'f', 'S', 'm', '1945']

4453, 5, 3, 7433, 9803, 6281, 6, 19, 13, 1945