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: ['2561', '9447', '9539', '3259', '3025', 'l', 'm', '9227', '2133', '7857', 'h', '9225', '2771', 'v', 'n', 'v', '9149', '2953', 'V', '3507']

2561, 9447, 9539, 3259, 3025, 12, 13, 9227, 2133, 7857, 8, 9225, 2771, 22, 14, 22, 9149, 2953, 22, 3507