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: ['s', '7627', 'c', 'T', '4505', 'i', '2275', '3529', '7721', '3985', '2823', 'd', '7617', 'L', '3561']

19, 7627, 3, 20, 4505, 9, 2275, 3529, 7721, 3985, 2823, 4, 7617, 12, 3561