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: ['m', 'Q', 'G', '1393', '4039', '6435', '8211', 'k', '8839', 'u', '1269', '2091', 'H', 'E', 'Z', 'L', 'k', '9997', 'q', 'N', '4385', 'g', '6371']

13, 17, 7, 1393, 4039, 6435, 8211, 11, 8839, 21, 1269, 2091, 8, 5, 26, 12, 11, 9997, 17, 14, 4385, 7, 6371