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: ['1919', '9399', '6785', '8735', '2605', 'N', '3923']

1919, 9399, 6785, 8735, 2605, 14, 3923