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: ['2145', '5083', 'q', 'k', 'b', 'u', '7593', 'h', '1893', 'Z', '4499', 'm', 'H', 'i', '6207', '3481', '9233', '7151', 'T', '8015', 'h', 'O', '8239', 'U', '9467', 'z', '5431', '2961', 'h', '8991', 'K', 'X', 'Z', 'p', '2881']

2145, 5083, 17, 11, 2, 21, 7593, 8, 1893, 26, 4499, 13, 8, 9, 6207, 3481, 9233, 7151, 20, 8015, 8, 15, 8239, 21, 9467, 26, 5431, 2961, 8, 8991, 11, 24, 26, 16, 2881