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: ['G', '5701', '2471', '4675', 'G', '1367', '5549', 'B', 'g', 'P', 'n', '8571', 'S', '8179', 'B', 'T', 'W']

7, 5701, 2471, 4675, 7, 1367, 5549, 2, 7, 16, 14, 8571, 19, 8179, 2, 20, 23