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: ['1165', 'm', '3869', 'f', 'E', 'O', 'N', 't', 'A']

1165, 13, 3869, 6, 5, 15, 14, 20, 1