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: ['w', '1781', '9007', '477', 'g', 'Q', 'U', '4495', 'b', 'g', '2847', 'z', '1391', 'E', 'O', 't', '9761', '8651', 'A', 'l', 'P', '755', '2421', '8417', 'o', '2023', 'f', '4479', 'G', 'O', 'U', 'K', 'i']

23, 1781, 9007, 477, 7, 17, 21, 4495, 2, 7, 2847, 26, 1391, 5, 15, 20, 9761, 8651, 1, 12, 16, 755, 2421, 8417, 15, 2023, 6, 4479, 7, 15, 21, 11, 9