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: ['8687', '8635', 'T', 'g', '9257', '577', 'b', 't', '6291', '983', '6315', 'P', 'Y', 'V']
A:
8687, 8635, 20, 7, 9257, 577, 2, 20, 6291, 983, 6315, 16, 25, 22