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: ['p', 'W', '4369', 'G', 'B', '1783', '3399', '329', 's', 'D', '9405', 'G', 'c', '1065', '1095', '807', '6239', '199', 'Z', '4547', '1241', '4991', 'e', 'G', 'V', '5471', 'f', '2017', 'm', 'k']

16, 23, 4369, 7, 2, 1783, 3399, 329, 19, 4, 9405, 7, 3, 1065, 1095, 807, 6239, 199, 26, 4547, 1241, 4991, 5, 7, 22, 5471, 6, 2017, 13, 11