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.

['2581', 'X', '3249', '753', '5639']
2581, 24, 3249, 753, 5639

['N', '4731', '2087', 't', 'g']
14, 4731, 2087, 20, 7

['m', 'b', '9023', '7737', '2433', '3629', '3767', '3463', 'k', '1929', 'L']

13, 2, 9023, 7737, 2433, 3629, 3767, 3463, 11, 1929, 12