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: ['9545', '9681', 'H', '4511', 't', 'N', 'j', '9115', '4631', 'h', 'l', 'y', 'U', '8589', 'h', 'o']

9545, 9681, 8, 4511, 20, 14, 10, 9115, 4631, 8, 12, 25, 21, 8589, 8, 15