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: ['n', 'N', 'p', '4443', '5731', 'v', '2919', 'X', 'B', 'a', '947']

14, 14, 16, 4443, 5731, 22, 2919, 24, 2, 1, 947