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: ['3239', 'J', 'z', 'z', '3449', 'e', 'n', 'W', 'f', 'j', 'S', '1885', 'h', '9445', 'w', '3447', '7477', 'D', '5009', '8953', 'r', 'y', 'W', '6969', '3427', '717', 'L', '9691', '4697', 'f', '6139', '2057', '1497', '1495', '4447', 'C', '4161']

3239, 10, 26, 26, 3449, 5, 14, 23, 6, 10, 19, 1885, 8, 9445, 23, 3447, 7477, 4, 5009, 8953, 18, 25, 23, 6969, 3427, 717, 12, 9691, 4697, 6, 6139, 2057, 1497, 1495, 4447, 3, 4161