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: ['b', '9683', '4183', 'S', '9831', 'f', '6763', 'G', 'J', '5161', 'C', '2821', '4125', 'M', 'o', 'S', 'T', 'a', '9483', 'r', '7117', 'G', 'x', 'D', 'Q', '6939', '2167', '4391', '2391', '5931', 'r', 'a', '9921', 'P', '5051', '2777', '1157', '8491']

2, 9683, 4183, 19, 9831, 6, 6763, 7, 10, 5161, 3, 2821, 4125, 13, 15, 19, 20, 1, 9483, 18, 7117, 7, 24, 4, 17, 6939, 2167, 4391, 2391, 5931, 18, 1, 9921, 16, 5051, 2777, 1157, 8491