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: ['6235', 'Q', '9569', 'E', 'R', 'r', '4129', 'V', '6389', '3429', '6323', '6887', 'Q', 'q', 'B', '3679', '7823', 'r', 'r', '2187', 'u', '5299', '3733', '7619', '8537', 'q', '1317', '6203', '9825', 'g', 'Y', '7609', 'l', 'o', '2651', 'V']

6235, 17, 9569, 5, 18, 18, 4129, 22, 6389, 3429, 6323, 6887, 17, 17, 2, 3679, 7823, 18, 18, 2187, 21, 5299, 3733, 7619, 8537, 17, 1317, 6203, 9825, 7, 25, 7609, 12, 15, 2651, 22