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: ['W', '9681', 'm', '9625', '4613', '3663', 'w', '1537', '4351', '295', 'p', 't', 'c', '1695', '5539', 'g', 'a', '6113']

23, 9681, 13, 9625, 4613, 3663, 23, 1537, 4351, 295, 16, 20, 3, 1695, 5539, 7, 1, 6113