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', 'y', 'U', 'Y', 'f', '1233', 'C', '3909', 'H', '7095', '717', '1347', '9771', '2339']

23, 25, 21, 25, 6, 1233, 3, 3909, 8, 7095, 717, 1347, 9771, 2339