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: ['t', '3333', 'c', '177', 'u', 'X', 'Q', '1421', '5631', 'T', '4299', '879', 'D', '6215', 'O', 'l', 'I', '6187', '765', '5885', 'm', '6531', '1821', '6727', 'W', '5003', '3959', 'v']

20, 3333, 3, 177, 21, 24, 17, 1421, 5631, 20, 4299, 879, 4, 6215, 15, 12, 9, 6187, 765, 5885, 13, 6531, 1821, 6727, 23, 5003, 3959, 22