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: ['d', 'S', 'h', 'P', '1549', 'v', '3573', '3777', 'h', '2415', '2627', '5289', 't']

4, 19, 8, 16, 1549, 22, 3573, 3777, 8, 2415, 2627, 5289, 20