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: ['T', '1759', '8681', 'W', 's', '9581', '971', '4413', 'J', 'w', '417', '5975', 'O', '8907', '3615', 'p', 'J', 'i']

20, 1759, 8681, 23, 19, 9581, 971, 4413, 10, 23, 417, 5975, 15, 8907, 3615, 16, 10, 9