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.

['1405', '4231', '8119', 'b', 'L', '3085', '5817', '5737', 'b', '7413']
1405, 4231, 8119, 2, 12, 3085, 5817, 5737, 2, 7413