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: ['o', 'S', '5687', '8695', 'I', '5337', 'S', 'y', '447', 'O', 'y', '5641', '4169', 'F', 'n', '4063', '8135', '3735', 'n', '8519', '7875', 'I', '5455', '6389', '4405', '2345', '7073', '5893', '6233', 'f', '6533']

15, 19, 5687, 8695, 9, 5337, 19, 25, 447, 15, 25, 5641, 4169, 6, 14, 4063, 8135, 3735, 14, 8519, 7875, 9, 5455, 6389, 4405, 2345, 7073, 5893, 6233, 6, 6533