Detailed Instructions: 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.
Q: ['8275', '4483', 'C', 'S', 't', 'h', 'N', '6923', 'V', '5715', '8805', '6887', '6905', 'p', '837', 'U', 'd', '1147', '1865', '6643', 'M', 'N', '8323', '3621']
A:
8275, 4483, 3, 19, 20, 8, 14, 6923, 22, 5715, 8805, 6887, 6905, 16, 837, 21, 4, 1147, 1865, 6643, 13, 14, 8323, 3621