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: ['5931', '4885', '5575', '5573', 'b', 'T', '6303', '7807', 'A', '1403', 'a', '1759', 'B', '5029', 'C', 'a', '3715', '5063', '8651', '8143', 'a', 'q', 'C', '7321', 'Y']

5931, 4885, 5575, 5573, 2, 20, 6303, 7807, 1, 1403, 1, 1759, 2, 5029, 3, 1, 3715, 5063, 8651, 8143, 1, 17, 3, 7321, 25