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: ['807', '1745', 'O', '3083', 'o', '7727', '4565', '7045', '2215', 'b', '9423', 'H', '6851', '8329', '9813', '5235', '2877']

807, 1745, 15, 3083, 15, 7727, 4565, 7045, 2215, 2, 9423, 8, 6851, 8329, 9813, 5235, 2877