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: ['x', '1041', 'F', 'T', '3809', 'B', 'I', '4307', 'c', '6507', 'U', 'q', '5183', 'C', 'I', 'g', 'o', 'Y', 'E']

24, 1041, 6, 20, 3809, 2, 9, 4307, 3, 6507, 21, 17, 5183, 3, 9, 7, 15, 25, 5