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: ['J', 'v', 'N', '9971', '3859', 'W', 'P', '8487', 'j', '9901', 'z', 'Y', '6623', 'f', '1447', '655', '8389', 'z', '8069', '4525', '8477', '9659', 'P', '1807', 'e', 'i', 'e', 'r', 'S', 's', '2685', 'y', 'E', '7257']

10, 22, 14, 9971, 3859, 23, 16, 8487, 10, 9901, 26, 25, 6623, 6, 1447, 655, 8389, 26, 8069, 4525, 8477, 9659, 16, 1807, 5, 9, 5, 18, 19, 19, 2685, 25, 5, 7257