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: ['6543', '4335', '9291', 'V', '2981', 'g', 'q', 'b', 'W', '5143', 'L', '9317', 'T', '9017', 'h', 'H', 'N', '467', '4679', '1251', 'n', 'U', '637', 'q', '1387', 'O', '9521', '6001', '4213', '915', '9835', '9353', 's', 'e', 'X', 'k', 'P', '9079', 'V', 'o']

6543, 4335, 9291, 22, 2981, 7, 17, 2, 23, 5143, 12, 9317, 20, 9017, 8, 8, 14, 467, 4679, 1251, 14, 21, 637, 17, 1387, 15, 9521, 6001, 4213, 915, 9835, 9353, 19, 5, 24, 11, 16, 9079, 22, 15