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: ['8147', 'y', '2605', '2395', '237', 'x', '4837', '2521', 'p', '5371', 'I', 'V']

8147, 25, 2605, 2395, 237, 24, 4837, 2521, 16, 5371, 9, 22