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: ['4883', '1039', '1717', 'K', 'Q', 'P', 'V', 'P', '7901', 'd', 'J', 'K', 'x', '7799', '1977', '4747', 'O', '5887', 'O', '1069', '4393', 'j', '4669', '5507', '2701', '6547', 'B', '9679', 'F', '5883', 'M', '9919', 'M', 'O', '4497', 'V', 'A', 'i']

4883, 1039, 1717, 11, 17, 16, 22, 16, 7901, 4, 10, 11, 24, 7799, 1977, 4747, 15, 5887, 15, 1069, 4393, 10, 4669, 5507, 2701, 6547, 2, 9679, 6, 5883, 13, 9919, 13, 15, 4497, 22, 1, 9