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: ['705', 'v', 'N', '3337', 'm', 'B', 'N', '173', '9979', 'f', '5043', '2863', '5121', '155', '2379', 'U', 'B', '6095', 'v']

705, 22, 14, 3337, 13, 2, 14, 173, 9979, 6, 5043, 2863, 5121, 155, 2379, 21, 2, 6095, 22