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: ['855', '7721', 'c', '9515', 'J', '203', 'v', '7427', 'd', '9949', '8421', '7735', 'F', 'W']
A:
855, 7721, 3, 9515, 10, 203, 22, 7427, 4, 9949, 8421, 7735, 6, 23